Firstly Roll Paper vs. Sheet Paper: Basic Concepts and Differences
1. Roll Paper / Reel Paper
Roll paper is produced continuously on a paper machine and wound into a cylindrical shape around a paper core.
Features: Continuous length, fixed width, suitable for high-speed automated production
Applications: Printing machines, laminating machines, mounting machines, slitting machines, and other continuous paper-feeding equipment
Advantages: High efficiency, low waste, ideal for large-volume standardized production
2.Sheet Paper / Flat Paper
Sheet paper is made by cutting roll paper into rectangular sheets at a set length.
Features: Fixed size, easy for manual operation, stackable and transportable
Applications: Manual mounting, small-batch printing, sample making, packaging grey board, stationery card paper
Advantages: Flexible, easy to control, suitable for small orders and custom sizes
In short: roll is the raw material form, sheet is the finished product form. Most packaging paperboard, grey board, and specialty paper follow the process: roll production → slitting into sheets**.
Secondly Core Specifications of Roll Paper: The Source of Sheet Dimensions
Roll paper has three key parameters that directly determine the quantity and size of sheets that can be slit.
1. Roll Width
Refers to the transverse dimension of the roll. Common units: mm, inch.
Common widths for packaging board: 787mm, 889mm, 1092mm, 1194mm, 1300mm, etc.
Roll width determines: the maximum usable length or width of the finished sheet.
2. Roll Diameter
Affects machine compatibility, weight per roll, and total length.
Larger diameter means higher output per roll and fewer roll changes.
3. GSM / Thickness
- GSM: g/m² (weight indicator of paper)
- Thickness: mm (hand feel and stiffness of board)
Thickness directly determines slitting difficulty, stiffness, and application scenarios (e.g., 2mm grey board is often used for gift boxes and photo frame backboards).
-3. Sheet Paper Specifications: Three Systems – National Standard, Imperial, and Custom
1. National Standard: Domestic Size / Full Size (Most commonly used in China)
- Domestic size: 787mm × 1092mm
- Full size: 889mm × 1194mm
Widely used in printing and packaging factories, can be further cut into A4, A3, half-sheet, quarter-sheet, etc.
2. Imperial Inch Specifications (Common for export)
Commonly used for overseas orders:
8×10 inches, 12×16 inches
These sizes require precise slitting from rolls to ensure acid-free, anti-curl, and deformation-resistant performance.
3. Custom Sizes
Cut to any length and width according to product requirements such as gift boxes, photo albums, photo frames, and display stands.
This is the mainstream in the packaging and cultural & creative industries.
-Fourthly. From Roll to Sheet: Key Slitting Logic
- Width setting: Select a matching roll width based on the target sheet width
- Blade layout: Calculate the maximum number of sheets per roll to minimize edge waste
- Length setting: Set cutting length to ensure consistent sheet size
- Edge trimming: Remove burrs to ensure right angles, smoothness, and tight tolerance
-Finishing: Counting, bundling, and stretch-film wrapping to produce ready-to-use sheets
For acid-free board, art card paper, and rigid gift box board, slitting must also control:
- No edge breakage or delamination
- No deformation, anti-curl
- Dimensional tolerance ≤ ±1mm
- No scratches or indentations on the surface
Fifthly. How to Choose: Roll or Sheet?
Choose Roll Paper if:
- Monthly consumption is large and orders are stable
- Production uses automated equipment
- You pursue low cost and low waste
Choose Sheet Paper if:
- Small batches, samples, or trial production
- Export custom sizes (e.g., 8×10 inches)
- Manual processing, gift boxes, photo frames, art mounting
- Acid-free, anti-yellowing, and high flatness are required
The last but not least, Practical Application: Key Points for Art Mounting / Gift Box Industry
-Acid-free coating / acid-free treatment**: Must be completed during base paper or coating production
- 2mm thickness: Made by laminating multiple layers of grey board or slitting thick board
-8×10 inches: Precisely slit from standard rolls, dedicated to artworks, photo frames, and collectible packaging
-Requirements: Flat, anti-curl, non-discoloring, non-damaging to artworks
The conversion from roll to sheet is not just simple cutting, but a comprehensive reflection of specification design, cost control, and quality assurance.
Understanding this logic helps you act more professionally, accurately, and avoid mistakes in purchasing, quoting, production scheduling, and foreign trade communication.