Does the substrate change how I set up my artwork?

Yes. White paper lets process inks behave normally. Clear film, silver film, and dark kraft require a white underbase so colors look right. Metallized film changes how metallic inks and foils appear. Uncoated paper absorbs ink differently than coated. Colors look muted unless you compensate. Always confirm the exact substrate with your printer before final color is approved.

What is white BOPP vs clear BOPP?

White BOPP (biaxially-oriented polypropylene) has a white pigmented layer. Colors print on top and look like they would on white paper, no underbase needed. Clear BOPP is transparent film, which means whatever is behind it (bottle contents, product surface) shows through unless you print a white underbase under the color artwork.

How do I know what substrate my label will be printed on?

Ask your print provider during the quote. They will confirm the exact face stock (e.g. 'White BOPP 60#'), adhesive, liner, and any topcoat. Substrate choice affects ink adhesion, bleed requirements, dieline shape, and whether white underbase, overlaminate, or varnish are needed.

What is a Substrate in Printing? Paper, BOPP, Film, Kraft

TL;DR

Substrate is the printer's word for the material your artwork lands on. White paper, clear film, silver BOPP, kraft, metallized foil, shrink sleeve. The substrate determines whether you need a white underbase, how much bleed is required, how your dieline is shaped, what kind of topcoat is applied, and how vivid the colors look. Always confirm the exact substrate with your print provider during quote. Changing it after plates are made means restarting the file.

Common substrates by work type

Pressure-sensitive labels

Substrate	Appearance / use
White BOPP	Standard plastic label. Bright, waterproof, abrasion-resistant. No underbase needed.
Clear BOPP	See-through film for "no-label look" bottles. Needs white underbase under color artwork.
Silver BOPP / metallized	Premium metallic background. Needs white underbase under anywhere you want true color.
Uncoated paper	Matte craft look. Absorbs ink. Colors look muted and darker than screen.
Felt / textured paper	Wine, spirits, premium craft. Specialty adhesion, may need extra hit of white.
Synthetic (polyester / tyvek)	Tear-proof, waterproof. Industrial labels, chemical drums, outdoor use.

Flexible packaging

Substrate	Appearance / use
PET / PE laminate	Most pouches and films. Printed on the reverse side of a clear film, then laminated.
Metallized film (MET-PET)	Chip bags, premium snack pouches. Bright metallic background.
Foil laminate	Cosmetic sachets, pharmaceutical pouches. Full metallic barrier.
Kraft pouch	Coffee, tea, natural foods. Brown visible substrate. White underbase critical.
Paper / compostable	Eco packaging. Ink absorption behaves like uncoated paper.

Cartons

Substrate	Appearance / use
SBS (solid bleached sulfate)	White board for consumer goods, cosmetics, pharma.
FBB (folding boxboard)	Lighter-weight alternative. Mid-tier packaging.
CUK / kraft carton	Natural brown, beverage multipacks, craft goods.
Coated recycled board	Cereal, dry goods, print surface coated, core is recycled fiber.

Why substrate changes your artwork

Color appearance

Process inks are translucent. On white BOPP or SBS they look clean and bright. On clear film, silver film, or kraft, that translucency means the substrate shows through and your color shifts or mutes. A red that prints as a tomato on white paper prints as a dull brick on brown kraft unless you put white underbase under it.

White underbase

Any non-white substrate needs a white ink plate laid down underneath color artwork. Otherwise the color goes translucent against the substrate. See the white underbase page for setup details.

Bleed and dieline

Shrink sleeves, pouches, and irregular-shaped dies often require more bleed than a standard rectangular label. Confirm with the print provider. They may ask for 0.25" or more on a shrink sleeve where normal flexpack takes 0.125".

Finish compatibility

Some finishes only work on certain substrates. Hot foil stamps cleanly on coated paper and SBS but can tear on uncoated kraft. Soft-touch laminate reads great on SBS but dulls on uncoated. Confirm your finish choices against the substrate at quote time.

What to tell your printer

When you brief a print provider, specify:

Exact stock name, "White BOPP 2.0 mil, permanent adhesive, 40# liner", not just "white plastic label".
Finish, gloss, matte, soft-touch, or none.
Overlaminate, yes/no, gloss or matte.
Application, applied to glass, PET bottle, aluminum can, paper carton, ink adhesion and topcoat differ.
Storage / shelf conditions, freezer, refrigerator, outdoor, some stocks degrade in cold or UV.

Printing on a non-white substrate?

Preflight flags missing white underbase layers, detects silver BOPP jobs by substrate keyword, and calls out when white is set to overprint (which makes it vanish on press).

Check a file →

What is a substrate in printing?