1. Liquid sulfur dye is termly the leuco aqueous of sulfur dyestuff.

2. Bengoyl leuco methylene blue is prepared from methylene blue by reduction and acylation.

3. Development of preparation of acidic dyes by oxidization of triarylmethane Leuco was reviewed with 21 references.

4. The invention provides a nail polish which comprises components such as phthalide leuco dye, acetone, developer, pearl powder and diluter.

5. The dyeing promoter could rapidly combine with cotton fiber in alkaline solution and make the fiber cationization so that the affinity with indigo leuco and dye uptake would increase.

6. The inhibition of some inhibitors on lipoxygenase activity of human leucocytes was assayed using leuco—malachite green method.

7. A color forming composition or composite can include a polymer matrix, a thermally modifiable fluoran leuco dye having a latent developer attached thereto, and a radiation absorber.

8. Colour difference always exits in all cotton fabric dyed with leuco sulphurs. The author analysed this problem in a rather concrete way and introduced the steps to avoid it in details.