Consumers have discerning tastes when it comes to black shades in polyester fibers. Deepart BL is optimal for dyeing bluish blacks a deep color with depth. ◆ Maya Trading Co. has developed a processing agent that can achieve a negative b*-value (important in shade evaluation) without affecting the L*-value. Deepart BL makes negative b*-values possible over a wide range of L*-values. ◆ Many different problems occur when deeper shades of black are pursued. For example,chalk marks occur and there is a decrease in rubbing fastness(dry and wet);the incidence of deterioration in light fastness, washing fastness and sublimation fastness increases.

Deepart BL can put and end to these troubles

When Deepart BL is used in the deep-dyeing of polyester fibers, there is no change in shade over time. In addition, it does not cause chalk marks and had no effect on colorfastness of different kinds.

＜Example Usage＞

Step 1
	3％ows. Deepart BL Padding → 80−90％ pickup → pre-dry（1 min. at 150°C）

Step 2
	2.5％ows. Siltop EXP−1000 1.5％ows. Daikisol VT−100 Padding → tenter curing （40 sec. at 170°C）

＜Bluish deep-dyeing agent comparison test results＞

Processing agent Without agent Conventional agent (6％) Deepart BL (4％) L*- value 13.1 10.84 9.54 a*- value 0.64 0.74 b*- value 1.71 -0.56