5%,and the inverse proportion of polypropylene glycol and polyhexamethylene adipate is at 2∶1,the leather season agent has good properties.

The preparation of the matting agent for leather was carried out by manufacturing the organic matting adding material of the hollow heat-expansion microparticle, the aqueous acrylic resin and the polyurethane adhesive, separately, and adding some other auxiliaries.

Research on mensuration of brightener content for bright acid copper plating by spectrophotometry;

Study on the new brightener for zinc electroplating in soidium chloride bath;

Study on a New Brightener for Sulate Zn-plating;

In-situ Detection of the Effect of Brighter in the Solution for Nickel and Phosphor Alloy;

The effect of the noble and heavy metal ion brighteners in acidic electroless nickel solution on properties of coatings including hardness, bonding force, porosity and corrosion resistance were investigated.

The fundamental properties of the carrier,main and auxiliary brighteners commonly adopted in the brighteners for alkaline zincate zinc plating are presented,and the formulating principle and operating process are also described.

This paper relates the advance in the studies on brighteners for Co and its alloy platings in the last ten years,introduces systemmatically 7 types of brighteners and the characteristics,usage,operating conditions and related formulas of their baths,and finally puts forward some viewpoints about the selection and application of the brig- hteners.