Yellowing and ΔE: why discolouration shows backlit
ΔE is a single number for how far a colour has moved. Four fabrics all pass their yellowing limit; one clears it by 75% and one by 3%. Backlit, the visible threshold drops.
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Yellowing and ΔE: why discolouration shows backlit
ΔE is a single number for how far a colour has moved. Four fabrics all pass their yellowing limit; one clears it by 75% and one by 3%. Backlit, the visible threshold drops.
Blockout, black-back and double-sided are three different things
Three different things used interchangeably. Blockout is the performance, black-back the construction, double-sided the job. You can have blockout without black-back, and you can fail at double-sided with a genuine blockout.