Probably the most important aspect of
any sublimation operation is that of controlling the process
from beginning to end to come out with the desired result.
Due to the nature of the extreme TVI
(Tone Value Increase or from the old litho days we called it dot
gain) color management becomes vitally important as color
management and color workflow are the only way to get the best
color possible on the final product.
We at SCM take a very comprehensive
approach. When dealing with a customer (whether the end
user or a dealer / manufacturer) we start the end desired
result and build a color workflow to get to that end. We
don't just look at profiling specific machines but look at the
whole color workflow as that's the only way to get to the
desired result. Some things we look at for color
Based on the end results what
color workspace will we (or the customer) be creating
How will employee monitors
represent that color workspace.
In what enviornment will
customers be viewing soft proofs
What devices will produce the
product. Which profiles, rendering intents, max densities,
black generation will be used.
What lighting conditions will
the end product be viewed under. (incandescent, fluorescent,
metal halide, natural light, LED, etc. and what color
Aside from the color workflow we will work with the clients
in helping them understand the sublimation process and instruct
them on how to control the variables that affect color.
Some points we cover.
Printing machine (inkjets) color variables such
1. Print head color drift.
2. Damper color drift
3. Color drift from gravity fed ink systems 4. Color drift from different paper batches 5. Color drift from different ink batches 6.
Color drift from environment changes (humidity, temperature, etc)
7. Color drift issues from poor dye particle ink
Transfer machine issues affecting color such as:
1. Dwell time
2. Temerature (andthe dyes actually transfer)
3. Temperature Thermocouple (or Thermistor)
4. Pressure in how it relates to color
5. Post transfer issues (ghosting, fading, etc.)
Click to Enlarge
The graphic on
the left shows how the color comes in at 400 and 425 degrees. The
data is an average of the cymk. The graph on the right shows how
the cymk color comes in at 425 degrees