Simulated Process vs Spot Color Screen Printing: Key Differences
Compare spot color, simulated process and CMYK screen printing by art type, garment color, screen count and cost.
Three way comparison of spot color, simulated process and CMYK process by art, garment color, screens and cost.
Short answer: simulated process vs spot color comes down to the art: choose spot color for logos, type and flat graphics with a few solid colors, simulated process for photographic or gradient art on any garment color, especially darks, and CMYK process for photographic art on white or light garments.
Definition: spot color prints each solid color from its own screen; simulated process uses halftoned spot inks to recreate photo detail on any garment color.
Part of the screen printing guides in the DAX Learning Hub. New to screens and inks? Start with screen printing for beginners.
What Is Spot Color Screen Printing?
Spot color is the most common screen printing technique. Each color in the design is mixed as its own ink (often matched to a printed color guide or custom color) and printed through its own screen. It excels at logos, text, line art and cartoons, gives vivid, controllable color and clean edges, and needs an underbase on dark garments. Spot inks can also be printed as halftones for simple shading, but spot color alone does not reproduce photographs well.
What Is Simulated Process?
Simulated process separates full color art into a set of opaque spot inks, each printed as a halftone through its own screen, usually over a white underbase on dark garments. Your eye blends the dots into gradients, skin tones and shadows. Because the inks are opaque rather than transparent, it works on almost any garment color, and it is generally more forgiving on press than CMYK.
Simulated Process vs Spot Color vs CMYK Process
| Factor | Spot color | Simulated process | CMYK process |
|---|---|---|---|
| Art type | Logos, type, line art, flat colors | Photos, gradients, complex illustrations | Photos and full color art |
| Garment color | Any (underbase on darks) | Any, strong on darks | White or light garments |
| Ink | Opaque spot inks, solid or simple halftones | Opaque spot inks as halftones | Transparent cyan, magenta, yellow, black |
| Typical screens | One per color | Often about 6 to 9, including underbase and highlight white | Four, plus spot colors if needed |
| Separation skill | Moderate, vector art | High, raster separation | High, plus tight process control |
| Setup cost | Lowest when colors are few | Higher: more screens, setup and press time | Moderate screen count, demanding control |
Which Art Suits Each Method?
Art That Suits Spot Color
Vector logos, text, team marks and illustrations with distinct solid colors and clean edges. If the art has only a few colors, spot color is usually the simplest and most economical path.
Art That Suits Simulated Process
Photographs, portraits, wildlife, painted or airbrushed art and anything with smooth gradients or many blended colors, especially on dark garments. Source art should be a high resolution raster file at print size.
Art That Suits CMYK Process
Photographic art on white or light garments, when the shop has strong process control. Transparent process inks lose vibrancy on dark fabric, which is why many shops use simulated process for darks.
How Separations Affect Cost
Every screen adds film, coating, exposure, registration and cleanup, and every color adds press time. So cost tracks screen count and setup more than the design's look:
- Spot color with few colors keeps setup lowest and tends to price well at most quantities.
- Simulated process adds screens, separation time, tighter registration and finer mesh, so it costs more per job and is harder to justify on small orders.
- Higher quantities spread the setup across more pieces, which narrows the per piece gap.
- Mesh choice changes with halftone detail; see the screen printing mesh count chart.
To build those costs into a quote, see pricing custom apparel, and to compare screen setup against digital transfers, see screen vs DTF pricing.
Frequently Asked Questions About Simulated Process vs Spot Color (FAQ)
Can simulated process print on dark shirts?
Yes. That is its main strength. It prints opaque inks over a white underbase, so photographic art stays bright on black, navy and other dark garments.
How many screens does simulated process use?
Often about 6 to 9, counting the white underbase, a highlight white and the color channels. Very complex art can use more. Each extra screen adds setup time and registration risk, so separators aim for fewer, well chosen channels.
Is simulated process more expensive than spot color?
Usually, for the same garment and quantity, because it needs more screens, more separation work, more setup and more press control. On simple art with few colors, spot color is generally the economical choice.
What is the difference between simulated process and CMYK?
CMYK uses four transparent inks that rely on a white or light garment to show color. Simulated process uses opaque spot inks as halftones, so it works on dark garments and is generally more stable in production.
Ranges and methods on this page are typical starting points compiled from multiple supplier and trade sources. Figures vary by product, so always check your supplier spec and test before production.
Want to see separations and multi color presses in action? Browse more guides in the DAX Learning Hub, and check cities and dates on the DAX show schedule when you are ready to compare screen printing approaches with suppliers in person.