13.5 GSM is one line on an order form, and it is the line that leaves everything else open. Here is the full specification a tissue parent roll should carry, field by field, so two quotations can be compared on paper and not on samples.
Direct answer
- 13.5 GSM needs three numbers attached to it: grammage, ply count and layers. A two-ply facial tissue at 13.5 g/m² is two 6.75 g/m² plies, and a three-ply sheet at the same total grammage is a different product with a different converting behaviour.
- The furnish line decides the grade before any number does. Virgin wood pulp and pure wood pulp are different things, and the difference is the difference between a household tissue grade and something you cannot put on a face.
- Say whether you are buying a parent roll or a jumbo roll. A mother roll or parent roll is usually bigger than a person and is converted into toilet tissue, jumbo roll, facial tissue, napkin, hand paper towel, kitchen towel and handkerchief paper, so the converting machine and the finished product have to be named on the order.
- Write the tolerance, not the target. Grammage, brightness, diameter, core and defect limits all need an acceptance band and a test method, otherwise acceptance becomes an argument on the loading dock.
- Ask for the certificate with the roll, not after it. A mill certificate carrying the grammage, the ply structure, the furnish and the brightness is what converts a sample into a specification you can re-order against.
13.5 GSM appears on so many tissue enquiries because it is one of the few numbers a buyer can write down without knowing how the roll will be converted, which is exactly why it causes so much trouble. Two rolls of the same nominal grammage can differ in ply structure, furnish, edge trim and behaviour on the converting line, and none of that is visible in the number.
We have been making parent rolls and jumbo rolls at Ningbo Bincheng Packaging Materials for 20 years, supplying the household tissue, industrial paper board and cultural paper markets, and the product scope behind this guide is our mother roll and parent roll range: facial tissue parent rolls in virgin wood pulp, wood pulp napkin tissue, bamboo napkin jumbo rolls, toilet tissue parent rolls, kitchen towel and hand towel parent rolls, handkerchief pocket rolls and patterned tissue parent rolls.
What 13.5 GSM Actually Describes
Grammage is mass per unit area in grams per square metre, and it is a weight, not a thickness, which is the first thing that goes wrong in a tissue order.
Two sheets can weigh the same and behave completely differently. A single-ply sheet at 13.5 g/m² is heavier, stiffer and more transparent than a two-ply sheet at the same grammage, where each layer is 6.75 g/m² and therefore thinner, softer and more opaque. The number is identical; the product is not. Caliper, measured in microns, depends on how much the fibre has been refined and how hard the sheet has been calendared, so it is specified separately whenever it matters to the converting line.
Because a facial tissue buyer who orders by grammage alone receives a roll that may be a ply lighter than planned and a buyer who orders a total grammage without stating the ply split receives a different sheet structure than the one the machine was set for, the order has to say the total grammage, the number of plies and the number of layers per sheet separately.
Parent Roll or Jumbo Roll: Name the Converting Line
The two terms are used interchangeably in conversation and are not interchangeable in a specification.
A mother roll or parent roll is usually bigger than a human being. It is the starting material for converting into toilet tissue, jumbo roll, facial tissue, napkin, hand paper towel, kitchen towel, handkerchief paper and similar products, which means the roll you buy has to match the width, the core, the diameter and the unwind behaviour of a specific converting line. A jumbo roll, by contrast, is the large-diameter roll used directly on a tissue machine to make toilet tissue rolls and kitchen towel rolls.
Because the same parent roll can be correct for a small facial tissue line and unusable on another, the order has to state the finished product and the machine, and the supplier has to confirm what the roll is wound and sized to feed.
Furnish: The Line That Decides the Grade
For a tissue that touches the face, the furnish line is the most consequential sentence on the order form, and the vocabulary around it is where most misunderstandings start.
- Virgin wood pulp. Made only from wood chips, cooked and extracted for wood fibres, without being used before. High-grade tissue paper is made from 100% virgin wood pulp, and the raw material choice is closely tied to how the finished product performs in use.
- Pure wood pulp. Wood pulp that may include recycled pulp, that is, waste pulp made from recycled waste paper. It is a widely used label on household paper packaging and it is not the same thing as virgin.
- The standard position. Tissue raw material should be wood, grass, bamboo and other raw fibres; recycled paper, printed paper, used paper products and other recycled fibrous materials should not be used, and deinking agent should not be used.
Because recycled pulp carries health considerations and because both labels appear on the same shelves, the order should carry the phrase 100% virgin wood pulp, the certificate should back it, and a supply chain that cannot document the fibre cannot promise the grade.
The Full Spec Sheet, Field by Field
Twelve fields, in the order a buyer needs them, and the reason each one is on the sheet.
- Product and target. Tissue parent roll for facial tissue converting, or for napkin, hand towel, kitchen towel, toilet tissue or handkerchief, with the converting machine named.
- Grammage and ply. Total 13.5 g/m² with ply count and per-ply grammage, plus the layer configuration per folded sheet, each with an acceptance band.
- Furnish. 100% virgin wood pulp, or 100% bamboo, with the certification scope for the fibre attached.
- Brightness and whiteness. The ISO brightness value with a tolerance, and the optical brightener position stated explicitly rather than left implicit, because fluorescent brighteners change the appearance of a tissue after storage and sit inside the substance framework that buyers in the EU have to work to.
- Caliper and density. Thickness in microns and the density the buyer converts to, because grammage alone does not describe how the sheet runs.
- Bond and embossing. Airlaid, drylaid, hydroentangled or conventional, the bond method between plies, and whether the roll is plain, point-bonded, patterned or decoratively embossed.
- Width and edge trim. Finished trim width, edge trim allowance and the acceptable edge condition, because a dirty edge becomes a web break at speed.
- Core and bore. Core material, outer diameter, bore, the joint type and whether the core is supplied with the roll, since a mismatched core is a stoppage on the unwind.
- Diameter and winding. Roll diameter, roll weight, rolls per order and any winding requirement that keeps the roll stable in storage.
- Defect tolerance. Impurities, specks, holes, creases, edge trim and breaks, stated as an acceptance limit with the sampling method, so inspection is a number and not an opinion.
- Converting performance. Tensile and stretch, cross-direction profile, take-off behaviour, bond strength and lint, which together decide whether the roll runs at the speed it was bought for.
- Documents and packing. Mill certificate with grammage, ply, furnish and brightness; fibre certification where a claim is made; and export packing, moisture protection and storage conditions.
Because every field is something a mill can confirm from its own production data, and because a buyer who writes them down receives rolls that behave the same way on every subsequent order, the spec sheet is not paperwork, it is what stops the second order becoming a new negotiation.
How to Verify a Parent Roll on Arrival
Six checks that take minutes and settle the argument before it reaches the customer.
- Weigh the sheet. Take a known area or a counted number of sheets, weigh it and compare against the grammage in the order. This check catches a ply-light roll immediately.
- Measure the caliper and count the plies. A two-ply sheet at 13.5 g/m² and a one-ply sheet at 13.5 g/m² feel different in the hand and measure differently under a micrometer.
- Read the furnish wording on the certificate, and confirm that it says virgin rather than pure or recycled, and that the fibre certification referenced matches the fibre being shipped.
- Check brightness with an instrument, not with the eye, and check the optical brightener position, since this is the field that changes after storage and is hardest to argue about later.
- Look at the edge and the web. Trim cleanliness, impurities, specks and holes are visible on a wound roll and are the fastest way to judge whether the roll will run.
- Check the core and roll geometry, and whether the roll is telescoped or set, because a roll that has taken a set in transit converts badly even if the paper inside it is perfect.
Because the arrival checks are the only point where the buyer holds physical evidence, they belong in the receiving routine rather than in a file closed when the truck leaves.
How to Order from Us
Seven details let us return a specification and a firm quotation rather than a general offer.
- Target product and converting machine, so the roll is wound for the right line.
- Grammage with ply count and per-ply split, and the finished sheet configuration.
- Furnish: 100% virgin wood pulp, 100% bamboo, or another fibre, with any certification you need to show your own customers.
- Width, core specification and required roll diameter.
- Brightness target, optical brightener position and any embossing or pattern requirement.
- Defect tolerance and the sampling method you want applied, which is faster to agree before production than after a complaint.
- Volume, packing standard and the destination, so the moisture protection and documentation match the route.
We do not publish tissue prices here, because grammage, ply structure, furnish, width, diameter, certification and packing all move the number, so the useful answer is a quotation against a written specification. Because the same production base also runs ivory board, art board, duplex board, food-grade paper board, kraft paper and copy paper, it is worth checking whether orders can be combined, which usually simplifies freight and documentation rather than adding to them.
Frequently Asked Questions
1. What does 13.5 GSM mean on a facial tissue parent roll?
It is the grammage, the mass of one square metre of the sheet in grams, and on its own it is not a product description. A two-ply facial tissue at 13.5 g/m² means two 6.75 g/m² plies, and a three-ply sheet at the same total grammage behaves differently on the line and on the shelf. Always order grammage, ply count and per-ply split together.
2. Is the difference between virgin wood pulp and pure wood pulp important?
It is the most important line on a facial tissue order. Virgin wood pulp is made only from wood chips, cooked and extracted for fibres, without being used before, while pure wood pulp may include recycled pulp made from waste paper. The standard position for tissue raw material is wood, grass and bamboo fibres, with recycled or printed paper and used paper products excluded, and no deinking agent used.
3. What is the difference between a parent roll and a jumbo roll?
A mother roll or parent roll is usually bigger than a human being and is the input for converting into toilet tissue, jumbo roll, facial tissue, napkin, hand paper towel, kitchen towel and handkerchief paper. A jumbo roll is the large-diameter roll used directly on a tissue machine. They are not interchangeable, so the order has to name the finished product and the machine.
4. Which fields should be on the spec sheet at minimum?
Grammage with ply count and per-ply split, furnish, width with edge trim, core specification, roll diameter, brightness with the optical brightener position stated, defect tolerance with a sampling method, and the mill certificate scope. Those fields decide whether the roll runs, how it looks and what claim can be made about it.
5. Which documents should arrive with the roll?
A mill certificate carrying grammage, ply structure, furnish and brightness, and the fibre certification where a virgin or certified-fibre claim is made, such as the FSC chain of custody or the PEFC programme, For EU deliveries the substance framework is the REACH annexes and the export packing sits under the Packaging and Packaging Waste Regulation, so both are worth settling with the order.
6. How do I check a roll quickly when it arrives?
Weigh a known area or a counted number of sheets against the grammage, measure caliper and count plies, read the furnish wording on the certificate, check brightness with an instrument rather than the eye, look at edge and web for trim, impurities and holes, and check the core and whether the roll has taken a set in transit. Each takes minutes and together they settle the argument before the roll reaches the converting line.
Liam
Export Sales Manager, Ningbo Bincheng Packaging Materials Co., Ltd.
Liam is Export Sales Manager at Ningbo Bincheng Packaging Materials Co., Ltd., a paper manufacturer with 20 years of industry experience specialising in parent rolls and jumbo rolls for the household tissue, industrial paper board and cultural paper markets. The product range includes tissue parent rolls, ivory board, art board, duplex board, food-grade paper board, kraft paper and copy paper, with reliable supply capacity for global paper traders and converters.
Post time: Nov-03-2026