GSM paper refers to the weight of paper measured in grams per square meter. A paper rated at 100 GSM weighs 100 grams for every square meter of material. In general, a higher GSM indicates a heavier paper that may feel thicker and provide greater stiffness, but GSM does not determine thickness or strength on its own. Fibre type, density, coating, moisture resistance, and manufacturing structure also affect performance.
For food wrapping, tissue paper, printed napkins, and packaging, choosing the right GSM helps you balance flexibility, durability, print quality, product protection, and cost. A lightweight tissue sheet may need 17–28 GSM, while a stronger kraft or food wrapping paper may require 40–120 GSM or more. The correct specification depends on the product, wrapping method, printing process, and expected handling conditions.
Key Takeaways
- GSM means grams per square meter and is the standard measurement for paper weight.
- A higher GSM usually means a heavier and more substantial paper, but it does not always mean better quality.
- GSM and thickness are related but not interchangeable.
- Food wrapping paper commonly falls between 20 and 120 GSM, depending on the paper type and application.
- Tissue paper is commonly produced in the 17–40 GSM range.
- Paper GSM affects handling, stiffness, ink absorption, opacity, folding, and perceived product quality.
- You should assess GSM together with coating, fibre composition, moisture resistance, and food-contact requirements.
- Accurate GSM measurement requires a known sample area and a precise scale.
What Is GSM Paper?
GSM stands for Grams Per Square Meter. It is also called paper grammage or paper weight. The measurement shows how much one square meter of paper weighs, regardless of the paper’s standard sheet size.
For example, if a paper specification is 80 GSM, one square meter of that paper weighs 80 grams. If another paper is 250 GSM, one square meter weighs 250 grams. The 250 GSM paper will normally feel heavier and more rigid, although its actual thickness depends on its density and construction.
A paper’s GSM can influence:
- Flexibility and folding performance
- Stiffness and shape retention
- Opacity and show-through
- Ink absorption and drying
- Tear resistance
- Surface feel
- Shipping weight
- Overall packaging cost
GSM is a weight measurement, not a complete quality rating. A lightweight tissue paper can be the correct high-quality material for delicate wrapping, while a heavy paper may be unsuitable if it is too rigid for the intended use.
Does Higher GSM Mean Thicker Paper?
Higher GSM often corresponds to thicker paper, but the two measurements are not identical. Two papers can have the same GSM and different thicknesses because they use different fibres, densities, coatings, or manufacturing processes.
Bulkier paper contains more air between the fibres, while dense paper packs the fibres more tightly. A bulky 80 GSM sheet may feel thicker than a dense 100 GSM sheet. Coatings and laminations can also change thickness without producing the same change in paper weight.
When thickness is important, request both:
- GSM or grammage
- Caliper or thickness, usually measured in microns or points
This is particularly important for folded cartons, food pouches, printed napkins, tissue sheets, and paper products that must fit within a specific dispenser or packaging format.
Standard GSM Paper Sizes & Measurements
Paper is produced in many GSM ranges because different applications require different levels of flexibility, strength, opacity, and structure. Newspapers, notebooks, business cards, food wrappers, tissue sheets, and paper bags all use different paper weights.
The exact specification may vary according to the paper grade, coating, fibre composition, and converting process.
| GSM Range | General Characteristics | Common Applications |
|---|---|---|
| 17–40 GSM | Very lightweight, soft, and flexible | Tissue paper, wrapping tissue, napkins |
| 35–55 GSM | Thin and economical | Newspapers, lightweight wrapping paper |
| 40–80 GSM | Flexible with improved handling strength | Greaseproof paper, parchment paper, butcher paper |
| 75–100 GSM | Lightweight office paper | Notebooks, forms, household and office printing |
| 100–140 GSM | More substantial and printable | Flyers, inserts, menus, lightweight promotional materials |
| 170–300 GSM | Firm and moderately rigid | Covers, folders, premium menus, paper cups |
| 350–450 GSM | Heavy and board-like | Invitations, greeting cards, business cards, packaging cards |
Paper Weight Measurements
Paper suppliers may use several measurements to describe paper. Knowing what each measurement shows can help you compare quotations and choose the right material.
- GSM: The weight of one square meter of paper in grams.
- Caliper: The physical thickness of the paper, usually measured in microns or points.
- Basis weight: Paper weight calculated according to a defined sheet size, commonly used in North America.
- Bulk: The relationship between paper thickness and GSM.
- Coating weight: The amount of coating applied to the paper surface.
When ordering custom paper products, GSM alone may not provide enough information. Your paper details should also include the sheet size, paper type, colour, coating, finish, moisture resistance, printing method, and acceptable production variation.
GSM In Printing
The right GSM affects how paper behaves during printing, folding, cutting, and packaging. It also influences the appearance of the final product. Choosing paper only by price can create problems such as ink show-through, paper jams, curling, poor folding, or weak handling performance.
A lighter paper may be suitable for high-volume printing, but it can lack opacity and stiffness. A higher GSM sheet may provide a more substantial feel, but it may require different machine settings and can increase shipping costs.
1. Ink Absorption and Drying
Paper surface structure affects how ink spreads and dries. Porous, lightweight paper can absorb ink quickly, while coated or smoother paper may hold ink closer to the surface.
The wrong GSM or surface specification can cause:
- Ink bleeding
- Show-through on the reverse side
- Uneven colour density
- Slow drying
- Smudging during folding or stacking
- Loss of fine text and image detail
For printed tissue paper and custom napkins, you should assess GSM together with softness, surface smoothness, absorbency, and the selected printing process. A tissue sheet must accept ink without becoming too wet, stiff, or distorted.
2. Machine Handling
Paper weight affects how a sheet travels through printing and converting equipment. Extremely lightweight materials can wrinkle, curl, or move out of alignment. Heavy paper may require adjusted feeding pressure, folding settings, or cutting parameters.
Before mass production, you should test the selected paper on the actual equipment. A material that performs well in a laboratory sample may behave differently during high-speed printing or automatic wrapping.
3. Appearance and Product Presentation
GSM affects how customers experience a printed product. A heavier menu, card, or packaging insert may feel more durable. A lighter tissue sheet may create the soft, flexible appearance expected in gift packaging, food presentation, or product wrapping.
The correct choice depends on the intended brand position and physical use. Higher GSM is not automatically more professional. The best result comes from matching paper weight and finish to the product.
Why Does The Weight Of Paper Matter?
Paper weight matters because it affects the way paper performs throughout its service life. It influences whether a sheet folds cleanly, resists tearing, accepts printing, protects food, and maintains its appearance during transport and use.
For food and tissue products, the paper must also work with the product’s moisture, oil, heat, weight, and handling conditions. A paper that is too light may fail during wrapping. One that is too heavy may be unnecessarily expensive or difficult to fold.
1. Tear and Wrinkle Resistance
A higher GSM paper generally contains more material per square meter and may offer better resistance to tearing, creasing, and wrinkling. However, tear resistance also depends on fibre length, fibre orientation, wet strength, and coating.
For example, a tissue sheet may need to remain soft and easy to fold, while a paper bag or butcher sheet needs greater resistance to pulling and handling. The correct GSM is therefore a balance between strength and flexibility.
2. Ink Absorption and Opacity
Low-GSM paper is usually more transparent or translucent than heavier paper, particularly when it is made from fine, thin fibres. This can be useful for decorative tissue wrapping, but it may be unsuitable for double-sided printing or applications where the package contents should not show through.
A higher GSM paper can improve opacity and reduce reverse-side show-through. Nevertheless, paper composition and filler content can also have a major effect, so opacity should be specified separately when it matters.
3. Colour Reproduction
Paper weight affects printing stability, but colour reproduction also depends on whiteness, surface treatment, ink type, printing technology, and drying conditions.
A smooth and consistent surface can help produce cleaner graphics and more even colour. For custom printed napkins, food wrappers, and tissue paper, you should review a physical proof before approving full production.
4. Texture and Finish
Different GSM papers provide different tactile experiences. Tissue paper is selected for softness, flexibility, and lightness. Kraft paper is valued for strength and its natural appearance. Coated greaseproof or parchment paper may be selected for oil resistance and a smoother surface.
Finish options may include:
- Smooth or natural texture
- Gloss or matte coating
- White, brown, or coloured paper
- Printed branding or patterns
- Embossed or textured surfaces
- Grease-resistant or moisture-resistant treatment
How To Measure The GSM Of Paper
You can calculate GSM by weighing a paper sample with a known area. The basic formula is:
GSM = Sample weight in grams ÷ Sample area in square meters
A precise sample cutter provides the most reliable result, but you can also measure a rectangular sample with a ruler or measuring tape.
Step-by-Step GSM Measurement
- Prepare a precise digital scale, ruler, or measuring tape, and a representative paper sample.
- Measure the sample’s length and width.
- Convert the measurements to meters.
- Multiply the length by the width to calculate the sample area.
- Weigh the sample in grams.
- Divide the sample weight by the area in square meters.
Suppose your paper sample measures 20 cm by 25 cm and weighs 4 grams.
- Convert the dimensions to meters: 0.20 m × 0.25 m
- Calculate the area: 0.05 square meters
- Divide the weight by the area: 4 ÷ 0.05
- Result: 80 GSM
You can also calculate the area in square centimetres and divide by 10,000 to convert it to square meters.
How Manufacturers Check Paper GSM
A factory normally tests several samples from different points in a production roll or batch. This helps identify variation across the width and length of the material.
For commercial production, GSM testing should be combined with checks for:
- Caliper or thickness
- Moisture content
- Tensile strength
- Tear strength
- Surface smoothness
- Coating uniformity
- Print performance
- Grease or moisture resistance
At Liansheng Sempo, product specifications should be confirmed according to the intended application, converting process, and customer requirements. A sample test is recommended before a large order, especially for custom tissue paper, printed napkins, and food wrapping sheets.
Paper Weight
GSM is one part of the specification. You should also confirm whether the paper is coated, whether it is suitable for direct food contact, and whether it meets the requirements of the destination market.
1. Tissue Paper Sheets
Tissue paper is one of the lightest paper categories and is used for food presentation, product wrapping, cushioning, gift packaging, and decorative applications. Common tissue paper GSM ranges are approximately 17–40 GSM.
Two frequently used grades are:
| Tissue GSM | Typical Characteristics | Common Uses |
|---|---|---|
| 17 GSM | Very light, soft, and partly translucent | Decorative wrapping, product presentation, lightweight liners |
| 28 GSM | More opaque and substantial | Food wrapping, retail packaging, cushioning, printed tissue |
| 30–40 GSM | More durable and easier to handle | Heavier wrapping, premium napkins, stronger liners |
17 GSM tissue paper provides a delicate and translucent appearance. It may be suitable when visual presentation and softness are priorities.
28 GSM tissue paper provides more body and opacity. It is often preferred when you need a more traditional wrapping appearance and improved handling strength.
For printed tissue paper, the final result depends on GSM, ink coverage, paper absorbency, colour, and printing method. Excessive ink coverage can affect softness and may increase drying time, so a print test is important.
2. Custom Napkins
Custom printed napkins are used in restaurants, cafes, hotels, catering services, and event venues. Paper napkin GSM commonly ranges from approximately 15–40 GSM for lighter formats and can reach 60–80 GSM for thicker, multi-ply, or premium products.
Napkin performance depends on more than the weight of a single sheet. Ply count, embossing, absorbency, softness, sheet size, folding format, and wet strength all affect the user experience.
For example:
- Lightweight napkins suit fast-service restaurants and high-volume use.
- Medium-weight napkins provide a balance of softness, absorbency, and cost.
- Heavier napkins suit table service, hospitality, and premium food presentation.
Fabric napkins use a separate GSM system. Their weight ranges are not directly comparable with paper napkins.
Is GSM Or PT The Same?
No. GSM and PT measure different properties. GSM measures the weight of paper over a defined area, while PT, or point, measures material thickness.
One point equals one-thousandth of an inch. Therefore, 10 PT means a thickness of 0.010 inches. GSM does not convert directly to PT because paper density and structure vary between grades.
| GSM | PT |
|---|---|
| Measures paper weight | Measures paper thickness |
| Expressed in grams per square meter | Expressed in points |
| Affected by fibre type, density, fillers, and coating | Measures the physical caliper |
| Useful for comparing material weight | Useful for checking thickness and fit |
| Does not provide an exact thickness value | Does not indicate the paper’s total weight |
If your product must fit through a machine, dispenser, slot, folder, or packaging structure, request a caliper specification as well as GSM.
Factors To Consider While Choosing The Right GSM Paper
The right GSM depends on the product, production process, and customer experience you need to achieve. A paper that works for tissue wrapping may not be suitable for a greaseproof food sheet or a paper bag.
1. Intended Use
Start with the actual use scenario. Consider whether the paper will wrap food, absorb liquid, carry a product, protect a surface, or provide decorative presentation.
Ask:
- Will the paper touch food directly?
- Will it contact oil, water, steam, or condensation?
- Will it be folded, twisted, sealed, or crimped?
- Does it need to fit a dispenser or automatic machine?
- Will it be used once or repeatedly?
- Does the printed side need to remain visible?
2. Durability
Choose a GSM that can withstand normal handling from production through final use. Durability depends on more than grammage, so review tear resistance, tensile strength, wet strength, and coating performance where relevant.
For heavier food products or takeaway packaging, a stronger paper structure may be more important than simply increasing GSM. In some cases, a lighter but well-designed paper can perform better than a heavier material with poor fibre construction.
3. Perceived Quality
Paper weight affects how a package or printed item feels in the customer’s hands. A premium restaurant may prefer a thicker napkin or a more substantial printed food wrapper. A high-volume takeaway business may prioritize lightness, cost, and efficient disposal.
The best choice supports your brand without adding unnecessary material. A paper’s colour, texture, softness, print quality, and fold can be just as important as its GSM.
4. Cost Effectiveness
Higher GSM usually means more fibre per square meter and a higher material weight. It may also increase transport and storage costs.
You should compare the total operating cost, including:
- Material price
- Printing cost
- Converting waste
- Shipping weight
- Storage space
- Machine speed
- Product damage or replacement
- Packaging performance
The lowest GSM is not always the least expensive option if it causes tearing, leakage, print failure, or customer complaints.
5. Paper Type and Coating
Paper type changes how GSM translates into performance. Kraft paper, tissue paper, parchment paper, greaseproof paper, wax paper, and coated papers can have different structures at the same weight.
Confirm the following before ordering:
- Base paper type
- GSM tolerance
- Caliper
- Coating or treatment
- Food-contact suitability
- Print compatibility
- Moisture and grease resistance
- Colour and surface finish
Conclusion
Choosing the right GSM paper helps you control paper performance, product presentation, printing results, and packaging cost. Low-GSM tissue paper is useful when you need softness, flexibility, and a lightweight appearance. Higher-GSM kraft, food wrapping, and napkin materials provide more body and handling strength, but the best result depends on the complete paper structure.
Remember that GSM is not the same as thickness, strength, or quality. For a reliable specification, assess GSM together with caliper, fibre composition, coating, moisture resistance, printability, and food-contact requirements. Liansheng Sempo can help you compare suitable paper weights and develop tissue or food wrapping products for your specific application. Contact Liansheng Sempo with your product details and sample requirements to discuss the appropriate GSM range.
Frequently Asked Questions
What Does GSM Mean in Paper?
GSM means grams per square meter. It shows how much one square meter of paper weighs. For example, 80 GSM paper weighs 80 grams per square meter.
Is Higher GSM Paper Better?
Not necessarily. Higher GSM usually provides a heavier and more substantial sheet, but the best GSM depends on the application. Tissue paper, food wrappers, napkins, cards, and bags require different paper weights.
What GSM Is Good for Food Wrapping Paper?
Food wrapping paper commonly uses 40–80 GSM, but the correct range depends on the paper type and food product. Lightweight wrappers may use 20–40 GSM, while stronger kraft food packaging can use 80–120 GSM.
What GSM Is Used for Tissue Paper?
Tissue paper is commonly produced in the 17–40 GSM range. 17 GSM is lighter and more translucent, while 28 GSM provides more opacity and handling strength.
Is GSM the Same as Paper Thickness?
No. GSM measures paper weight, while thickness is measured by caliper in microns or points. Two papers with the same GSM can have different thicknesses because of differences in density and fibre structure.
How Do You Calculate Paper GSM?
Use this formula:
GSM = Weight of sample in grams ÷ Area of sample in square meters
Measure the sample, calculate its area, weigh it, and divide the weight by the area.
What Is the Difference Between 17 GSM and 28 GSM Tissue Paper?
17 GSM tissue paper is lighter, softer, and more translucent. 28 GSM tissue paper is thicker, more opaque, and easier to handle for wrapping and printed packaging.
What GSM Is Best for Printed Napkins?
Paper napkins commonly range from 15–40 GSM, while thicker premium napkins may reach 60–80 GSM. The final choice also depends on ply count, absorbency, softness, embossing, and printing requirements.
Does Higher GSM Make Paper Stronger?
Higher GSM can improve resistance to tearing and handling damage, but strength also depends on fibre type, fibre direction, wet strength, and coating. GSM alone cannot predict the full strength of a paper product.
Can GSM Be Converted Directly to PT?
No. GSM and PT measure different properties, so there is no universal direct conversion. If thickness is important, request the paper’s caliper in addition to its GSM.
