Jinmai Plastic
Before approving corrugated plastic sign artwork, confirm the finished size, trim and bleed, image resolution, color requirements, front-to-back orientation, flute direction and mounting details. Approve a named file revision, and use a physical sample when color, readability or hardware fit needs verification. A screen proof alone cannot confirm every production detail.
A PDF can show the right logo while leaving the printer unclear about where to cut, which edge is the bottom or how the stake enters the board. For buyers ordering custom yard signs, event boards or printed PP hollow-sheet panels, those details belong in the same approval package as the graphics.
This guide focuses on the handoff between the buyer, designer and printer. It does not prescribe a universal bleed, resolution threshold or outdoor service life. Confirm the requirements for your actual printing and cutting workflow before exporting the final artwork.
Start with three separate approvals
| Approval | What it establishes | What it does not establish by itself |
|---|---|---|
| Artwork proof | Text, layout, design revision, page size and designated print faces | Exact physical color or performance outdoors |
| Production drawing | Finished dimensions, cut shape, flute orientation, holes and mounting references | That a particular ink and board combination meets the intended use |
| Physical sample, when required | Appearance, handling and fit of the sampled configuration | A guaranteed lifetime or performance of every possible configuration |
Jinmai’s UV printed hollow sheet and custom sign product is the place to discuss the board and printing requirement. Use the checklist below to make the artwork approval specific enough to accompany that quotation.
1. Confirm the finished size and the viewing orientation
Write the size as width × height, identify the units and mark the top of the installed sign. Keep one controlling unit on the production drawing. If a second unit is shown for reference, state which one governs cutting.
For illustration, a landscape sign specified as 24 in wide × 18 in high is different from a portrait sign with those dimensions reversed. These are example dimensions, not a Jinmai stock-size claim.
Also distinguish finished cut size from the artwork canvas. A file with extra bleed may be larger than the finished sign. Conversely, an image exported at a convenient screen size may have no reliable physical dimensions at all.
If the document is supplied at a reduced scale, label the scale and agree on it before prepress. Do not expect the printer to infer it from the filename.
2. Separate bleed, trim and the safe area
These three boundaries serve different purposes:
| Boundary | Meaning | Buyer check |
|---|---|---|
| Bleed | Background artwork extending beyond the intended cut | Does the background reach the bleed boundary in the approved template? |
| Trim | Intended finished edge | Does this match the quoted width, height and shape? |
| Safe area | An inner zone for critical text and graphics | Are the logo, telephone number and QR code clear of cuts and finishing features? |
Ask for the printer’s template for the selected product. The amount of bleed, safe margin and treatment of crop marks can vary with how the job is produced. Do not copy another supplier’s settings into a Jinmai order without confirmation.
If a white border is wanted, specify it as part of the design. If ink should run to the edge, state that explicitly. Agree on the appearance and acceptable variation of narrow borders; small cutting shifts can be conspicuous on a fine rectangular frame.
Keep hole locations and any frame overlap in mind as well. A logo can be inside the trim line but still hidden by a fixing or frame.
3. Check effective image resolution at the final size
Use vector artwork for logos and text where available. Raster photographs still need enough pixels for their printed size and viewing conditions. Saving a small screenshot inside a PDF does not make it a vector image.
Effective image resolution in pixels per inch = image pixels ÷ printed dimension in inches.
For example, a 3,600-pixel-wide photograph placed across a 24-inch-wide sign provides 150 pixels per inch along that axis. Enlarging it to 48 inches halves that value to 75. This is a calculation example, not a universal acceptance threshold; ask the printer what is suitable for the design and intended viewing distance.
Review the final exported file, not only the design application’s preview. In Adobe Acrobat Pro, Output Preview and Object Inspector can help inspect image resolution, color spaces and overprinting. These checks can find file problems, but they do not replace a physical sample where print appearance is critical.
4. Agree on the color workflow and proof expectation
Tell the printer which colors are important to match, and provide the agreed reference. Ask which PDF export settings, color profile and treatment of spot colors suit the production workflow. Avoid assigning an arbitrary profile or a generic rich-black formula simply because a different printer recommends it.
An ordinary monitor preview is useful for content and layout. It is not an agreed physical color standard. The substrate color, ink system and production process also affect the final appearance.
If brand color is critical, request a sample or proof arrangement and agree on how it will be evaluated before production. Identify the reference, substrate and viewing conditions. A color code helps communicate the target; it does not by itself promise an exact match.
For context, Coroplast’s print-material information describes surface treatment for adhesion with specifically formulated inks and adhesives. That manufacturer’s statement is not a specification for Jinmai’s board. The practical purchasing step is to confirm the actual board, ink and surface preparation together.
5. Review text, fonts and QR codes in the exported file
Proofread contact information, dates, URLs, decimal points and directional instructions. Have the person responsible for the message approve the actual proof revision; do not rely on the designer’s editable source file as the final record.
Confirm whether fonts should be embedded or converted to outlines for the selected workflow. Keep an editable master separately. After export, inspect the PDF for substituted characters, missing elements or unexpected transparency and overprint effects.
For a QR code, verify its destination and preserve the clear area required by its design. Test the printed sample at the intended size and a realistic scanning distance using more than one device where practical. A successful scan from a large on-screen image does not establish readability on the finished sign.
6. Mark flute direction and the stake-entry edge
For a conventional H stake that enters from the bottom edge, the open channels must run upward from that edge in the installed sign. Mark a TOP label, a flute-direction arrow and the stake-entry edge on the production drawing. The orientation of the graphic alone is insufficient. Confirm the required flute and mounting orientation on the supplier’s drawing for your order.
This requirement is reflected in Digital Print Solutions’ corrugated-sign guidance, which tells stake users to arrange the files for vertical flutes. Its sheet sizes and printing specifications are supplier-specific, not Jinmai ordering defaults.
Confirm the actual stake and board fit rather than treating every wire stake as interchangeable. For wall-mounted boards, frames or signs with holes, describe the mounting system instead of automatically copying the H-stake arrangement.
Board thickness and stiffness are separate choices. Use the PP hollow sheet thickness guide to prepare that discussion; the artwork proof cannot establish wind resistance or mounting safety.
7. Approve both sides as they will be read after installation
For double-sided printing, label the files Face A and Face B, and show the top and bottom of each face. State whether the content is identical, different or includes directional arrows.
Do not simply tell the printer to “mirror the back.” Mirroring text would reverse the lettering. Instead, show how each face should look to a viewer standing on its side of the installed sign.
Directional signs need particular care: whether an arrow should point left or right depends on the viewer’s position and intended route. Include a simple installation sketch if the two faces might be interpreted differently.
Ask for the two faces to be checked against the same cutting and mounting references. If alignment of details across both sides matters, define the acceptance requirement with the supplier.
8. Keep cutting and mounting instructions separate from printed artwork
Ask how the printer wants cut paths, hole centers, corner details and other production notes supplied. Agree on the naming and treatment of any technical layers or spot colors. Clearly distinguish the file used to explain the job from the file used to print it.
This prevents a dimension line, “TOP” label or cut guide from appearing on the finished sign by mistake. It also avoids losing necessary production instructions when a designer removes all non-artwork layers before export.
For a custom shape, confirm the final contour and the position of important graphics relative to it. For holes or frames, check the real mounting hardware against the sample when fit is important.
9. Release one revision with the correct quantities
Build a small approval register rather than relying on a message that says “looks good.” Include:
- Job reference, finished size and controlling units.
- Artwork filename and revision, with Face A/Face B identified.
- Quantity per design and the number of printed faces.
- Approved drawing or template revision.
- Color reference and any sample approval record.
- Mounting accessories and whether they are packed with the boards.
- Named approver, approval date and any unresolved conditions.
An example filename is JM-SIGN-01_24x18in_FACE-A_REV03.pdf. It illustrates a naming convention, not a required file format or a confirmed order.
If artwork, size, board, finish or mounting changes after approval, issue a new revision and confirm what must be reviewed again. Ask the supplier to acknowledge the file being released so an older attachment is not mistaken for the production version.
Download the artwork approval checklist
Download the corrugated plastic sign artwork and proof checklist (CSV)
Use the blank worksheet to record buyer requirements, supplier confirmation and approval evidence. It deliberately leaves bleed, image-resolution targets, material specifications and performance requirements open for the actual project.
For an order covering several designs, complete a separate quantity and revision record for each one. Include the destination and requested schedule so the artwork approval and delivery plan refer to the same job.
Browse custom advertising and yard signs for the relevant product category, or send Jinmai the proposed size, quantity, print faces, mounting method and artwork for review.
Frequently asked questions
What file type should I send for corrugated plastic sign printing?
A print-ready PDF is a useful handoff format when accepted by the printer, but its contents and export settings still need checking. Confirm the workflow first, provide vector artwork where available, and identify any required source files. A PDF containing a low-resolution image will still have that image’s limitations.
Do all corrugated plastic signs need the same bleed?
No universal value is specified in this guide. Use the template approved for your supplier’s printing, cutting and finishing process. Confirm whether crop marks are wanted and whether the artwork should print to the edge or leave a border.
Does UV printing guarantee that a yard sign will not fade outdoors?
No. The process name alone does not establish an outdoor service life. Describe the exposure, intended duration and appearance requirements, then ask for relevant evidence or an agreed evaluation of the actual board, ink and any finish.
Is a digital proof enough to approve H-stake fit?
It can document size, orientation and the intended stake-entry edge. Actual insertion and assembly fit require confirmation of the chosen hardware and board, with a physical check when needed. Keep that confirmation separate from approval of the graphics.
Send a complete sign-printing brief
Share the artwork revision, finished size, quantity per design, print faces, color priorities, installation method and delivery destination. Mark any items still awaiting confirmation. Jinmai can then review the proposed printed board and accessories against a clear purchasing brief.
Request a custom printed-board quotation
Scope note: This is a purchasing and artwork-approval checklist. Example dimensions and pixel calculations are illustrative. External sources explain prepress tools or supplier-specific practices; they do not certify a Jinmai product or define Jinmai’s production tolerances.
