Coloration science from color matching to fixation kinetics. Covers dyes, pigments, printing methods, shade reproducibility, and fastness testing. This section explains practical decision criteria, typical test methods, and failure modes that matter in real production. Readers get checklists, calculation steps, and case examples connecting specifications to cost, reliability, and compliance. Links map core concepts to upstream inputs and downstream processes so choices remain consistent across sourcing, manufacturing, and end-use performance. Each article includes definitions, diagrams where helpful, and plain-language notes to help newcomers ramp quickly while giving experienced professionals the depth needed to troubleshoot and optimize. Standards references are cited with context, and whenever trade-offs exist, we make them explicit so you can defend decisions.
Dyeing, Printing, Color Management & Chemical Control
Evaluates a continuous washing range as the counter-current cascade it is: computes the wash ratio, the impurity left on the cloth after a given number of boxes at a stated stage efficiency, the same water spent as independent baths for comparison, the boxes a target actually needs and the least water the boxes already built could run on.
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Dyeing, Printing, Color Management & Chemical Control
Models sublimation transfer as a saturating time-temperature dose, returning the efficiency a given press cycle achieves against the ceiling, the ink transferred and left on the paper, and what the residue costs per square metre.
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Dyeing, Printing, Color Management & Chemical Control
Combines spectrophotometer drift, repeatability and inter-instrument agreement in quadrature into an expanded uncertainty, subtracts it from the shade tolerance as a guard band, and reports which of the three terms is actually consuming the tolerance.
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Dyeing, Printing, Color Management & Chemical Control
Treats reactive wash-off as the geometric dilution series it is: computes the unfixed dye left after dyeing, the fixed fraction each rinse removes, the residual after a given number of baths, the baths actually needed to reach a target and the absurd single-bath liquor ratio that would match them.
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Dyeing, Printing, Color Management & Chemical Control
Derives screen open area and theoretical paste volume from mesh count and thread diameter, converts it into wet pick-up, dry deposit and dye applied per square metre, and gives the apparent viscosity a power-law paste has at squeegee shear rather than at rest.
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Dyeing, Printing, Color Management & Chemical Control
Models cyclic trimer released from polyester during high-temperature dyeing against what the cooling bath can still dissolve, returning the mass at risk of depositing on fabric and machine and the drop temperature above which nothing crystallises out.
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Dyeing, Printing, Color Management & Chemical Control
Separates metamerism from a plain shade mismatch by taking the colour difference under incandescent and fluorescent illuminants net of the residual difference under the reference, and reports the index, the margin against a limit and how many illuminants fail.
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Denim Manufacturing & Specialized Wet Processing
Turns bath concentration, wet pick-up and per-dip fixation into the indigo each box deposits, accumulates it across the sequence, and reports the dips or the concentration a target depth needs along with indigo consumption per tonne of warp.
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Dyeing, Printing, Color Management & Chemical Control
Fits the Cegarra-Puente rate constant from a single measured exhaustion point, then returns half-dyeing time, the times to reach 95 and 99 percent of equilibrium, the exhaustion the programmed cycle will actually reach and the dye left in the bath when it stops.
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Dyeing, Printing, Color Management & Chemical Control
Compares a batch against the vessel it is loaded into, holding the machine to its minimum circulating volume, and returns the effective liquor ratio, the chemical overdose that part-loading forces, the salt wasted per batch and the smallest batch that still runs at the design ratio.
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