Envelopes > Offset Printing > Standard Color Envelope

Paper color may differ from monitor display.

Size
Size	Envelope Size Width x Height mm Design Size Width x Height mm
Paper

Print Color
Quantity		sheets x types

Finishing

Ship Date	Est. shipping is 3-5 business days from proof approval. Finishing adds 1-3 days to shipping. We strive to meet estimated dates, but delays may occur.

Important Notice! Work Instructions

Color

Here are some helpful tips about print colors.

1. Printed colors will appear darker and less vivid than on your monitor.

Printing uses CMYK ink mixing, which works differently from the RGB light on your screen. An exact match between monitor and print is technically not possible.

Files submitted in Spot Color or RGB mode will be automatically converted to CMYK. This conversion may result in noticeable color shifts.

In gang-run printing, colors may print slightly lighter or darker, and minor variation between C (Cyan), M (Magenta), Y (Yellow), and K (Black) channels is expected.

Even with the same file, color results may vary depending on paper type and print timing.
Gang-run printing processes multiple orders on a single press sheet, which makes precise color control more difficult.
Large areas of dark background color may show roller marks, resulting in slight unevenness.
The front and back sides may appear slightly different in tone, even when the same color is used in the design file.
If exact color accuracy is essential, please provide a printed reference sample, place an individual-run order with press supervision, or contact our support team.
Gang-run products include: Business Cards, Hang Tags, Coupons, Leaflets, Square-Cut Stickers, Kiss-Cut Stickers, Standard Envelopes, and Flyers.

2. Colors with similar CMYK ratios or sensitive tones may print very differently.

Small differences in CMYK values can result in noticeably different printed colors. Color evaluation is based on your submitted file, not the printed result.

Color variation example: C=61%, M=52%, Y=52%, K=22%

When using sensitive colors with similar CMYK ratios or all four process colors as a background — especially olive, gray, and brown tones — there is a very high chance of ink drift causing uneven, gradient-like variations within the same background area.
In gang-run printing, multiple customers' jobs are placed on a single plate, so ink supply is affected by the color ratios of surrounding jobs. This same variation will occur even with reprints.
This is an inherent characteristic of gang-run printing and does not constitute a defect.

3. K=100% black is processed with overprint enabled.

If you do not want overprint applied, add 1% of another color to the black, or set the value to K=99%.

< Overprint K=100% >

< No Overprint >

< Rich Black (C=30% + M=30%) >

< Overprint Examples >

4. Patterns and textures require sufficient contrast with the background.

We recommend at least 20–30% color difference from the background.

< 10% Color Difference >

< 20%+ Color Difference >

< Patterns & Textures >

5. Use caution with text and lines made of mixed CMYK colors.

Slight misregistration between color plates may cause colors to spread or shift. This is more noticeable with thinner text and lines.
On dark backgrounds made of mixed CMYK colors, misregistration can cause thin elements to break up or disappear entirely.
For black text and lines, please use pure black (K=100%) only — not a mix of CMYK colors.
Even in a single color, extremely thin text or lines may not reproduce clearly in print.

6. Total CMYK ink coverage should be kept below 250%.

Higher ink density increases the risk of set-off (wet ink transferring onto adjacent sheets).
Pages may stick together, or ink may peel away from the surface.
For deeper tones, increase the K (Black) percentage rather than raising CMY values.
Depending on paper type and printing method, set-off can occur even below 250%.
Very high ink density may result in muddy dark tones or visible roller marks.

Cutting

Here's what you should know about the cutting process.

A cutting tolerance of approximately ±1–3 mm (0.039–0.118 in) is standard in the industry.

Because large quantities are cut at once, slight shifting may happen during the process.
Please keep all important content and text at least 3 mm (0.118 in) inside the trim line on all sides.
For catalogs and pamphlets, a margin of at least 5 mm (0.197 in) on each side is recommended.
Borders and symmetrical designs will not be cut perfectly evenly due to the nature of the cutting process.
Slight diagonal cuts may occur as a result of shifting.

Finishing

Please note the following about finishing.

A finishing tolerance of approximately ±1–2 mm (0.039–0.079 in) is standard in the industry.

Die-Cutting and Manual Finishing

Due to the nature of high-speed automated die-cutting, small structural nicks (connection points) are intentionally left along the cut edges to prevent product displacement and damage.

Example of die-cutting connection points (nicks)

After die-cutting, a manual finishing process is performed to remove excess material before shipment.
The number and placement of nicks may vary depending on material type, thickness, and die-cut shape.
Depending on paper type, thickness, and coating characteristics, marks may remain along the cut edges. Thicker paper tends to produce more visible marks.
These are a standard result of the manufacturing process, not defects, and can be easily removed before use.
For flat print products such as business cards, tags, and coupons, nicks will remain visible on the cut edges.
For envelopes and packaging, nicks are positioned to be concealed inside during assembly (gluing), though some may remain visible depending on the product structure.

Quantity

Here's our guide to gang-run printing quantities.

In gang-run printing, a slight shortage in quantity may occur. In most cases, this is managed within 5%.

However, depending on production conditions — such as ink density from other orders printed simultaneously — in rare cases (approximately 2% of orders), shortages may reach up to 10%.

Gang-run products include: Business Cards, Hang Tags, Coupons, Leaflets, Square-Cut Stickers, Kiss-Cut Stickers, Standard Envelopes, and Flyers.
Orders that include finishing options may experience a greater shortage due to additional setup waste (makeready).
If an exact quantity is required, please choose individual-run printing.

Cancellation & Refund Policy

Here is our refund policy for custom-made products.

All products are custom-manufactured to order. Refunds based on a simple change of mind are not available once production has begun.

Payment processing fees and related financial charges may be deducted for international orders.

To request a cancellation, please submit a 1:1 inquiry on our website.

Before design preview

Full refund available.

During production

Partial refunds may apply depending on the stage of production.

Before shipping

Only the shipping fee is refundable.

InDesign

Document Size

Create a new document and set the size for your print product. Set the trim size as page size, and configure the bleed for design size.

File → New → Document (Ctrl+N)

Intent: Print | Page Size: A4 (210×297mm) | Bleed: 3mm (all sides) | Slug: 0mm

Margin Settings

Set up safety margins to keep important content from being cut off. Use 3mm for small items (business cards, tags, coupons) and 5mm or more for larger items (flyers, pamphlets, catalogs).

Layout → Margins and Columns

Margins: 3mm (all sides)

PDF Export

After completing your design, export as PDF with the following settings.

File → Export (Ctrl+E)

Format: Adobe PDF (Print) | Preset: PDF/X-4:2008 | Marks and Bleeds: Use Document Bleed Settings

Illustrator

Document Size

Create a new document and set the size for your print product. Set width and height based on safety zone size. Add 3mm to each side for trim size (if using 3mm safety zone). Add 6mm for bleed (accounting for the 3mm safety zone). Use 3mm for small items and 5mm or more for larger items.

File → New (Ctrl+N)

Width: 297mm, Height: 210mm + 6mm | Bleed: 6mm (all sides) | Color Mode: CMYK | Raster Effects: High (300 ppi)

Convert Text to Outlines

All fonts must be converted to outlines.

Type → Create Outlines (Shift+Ctrl+O)

Convert Strokes to Outlines

All strokes must be converted to outlined paths.

Object → Path → Outline Stroke

Overprint Settings

Make sure to turn off overprint for both fill and stroke.

Window → Attributes (Ctrl+F11)

Overprint Fill: unchecked | Overprint Stroke: unchecked

Flatten Transparency

Objects using transparency effects must be flattened (Vector 100%).

Object → Flatten Transparency

Raster/Vector Balance: 100 (Vector) | Line Art and Text Resolution: 300 ppi | Gradient and Mesh Resolution: 150 ppi | Convert All Strokes to Outlines: checked

Rasterize Effects

Gradients, transparency, and other effects must be rasterized (converted to image).

Object → Rasterize

Color Model: CMYK | Resolution: High (300 ppi) | Background: White / Transparent

Check Document Info

Use Document Info to check for potential print issues. Click Objects in the panel menu. Items should show 'None' to avoid errors. If numbers appear, find and fix those objects using the methods above.

Window → Document Info

Panel menu (☰) → Objects

Photoshop

Document Size

Create a new document and set the size for your print product. Resolution must be 300 pixels/inch or higher, and color mode must be CMYK. Low resolution source files cannot be improved by increasing resolution settings. If your work is low resolution, you must start over with high resolution files.

File → New (Ctrl+N)

Width: 216mm, Height: 303mm | Resolution: 300 Pixels/Inch | Color Mode: CMYK Color, 8 bit | Background Contents: White

Right-click ruler → Millimeters (or Edit → Preferences → Units & Rulers)

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Amount Due

Calculating...

Print Fee	0
Finishing Fee	0
VAT	0
Shipping	0
Unit Price	₩ /ea
Total	₩ 0
(VAT Incl.)

Total Due	₩ 0
(duties & taxes excl.)
* Shipping may vary by destination.
0	0

Supplier	Reg. Number	119-17-28654
	Company	네이플	Representative	이준규
	Address	서울시 금천구 두산로 70, B동 324호 (현대지식산업센타)
	Business Type	Manufacturing	Industry	Offset Printing
	Phone	02-6677-7330	Fax	02-6677-7331

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Envelopes > Offset Printing > Standard Color Envelope

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