The basic meaning of rosin: 1. The unique fragrance of pine forest. 2. Alias pine paste, pine fat, pine glue. 3. Refers to the substance distilled from rosin. Solid, transparent, insoluble in water, soluble in alcohol, hard and brittle, light yellow or brown. It is an industrial raw material for the manufacture of paint, soap, paper, matches, etc. 4. Rosin is the oil flowing from the pine trunk that melts into water at high temperature and becomes solid after drying (no fixed melting point). Its color is burnt yellow and dark red, and it is an important chemical raw material. It is mainly used as a fluxant in circuit board welding in daily life. For learning ballet, rosin plays an anti-slip role. Properties Standard Inspection result Judge C19H29COOH >99% 99.2% passed appearance transparent transparent conform to standard color rosin color comparison block light yellow conform to standard softening point(R&B) >76&ordm;C 78&ordm;C special grade acid number mgKOH/g >164 165.6 special grade unsaponifiable matter content <5 4.2 special grade alcohol-insoluble residue% <0.03 0.005 special grade ash content% <0.02 0.016 special grade Notes The test results all meet the special requirements. Meet the national special class. Q1: Can I get some samples? A: Yes, we can supply the free sample, but the shipping cost be paid by our customers. Q2: What's your MOQ? A: Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid. Q3: How about delivery leadtime? A: Delivery lead time: Within 3-5 days after payment confirmed. Q4. We don't know you at all, how can we trust you? A: You are always warm welcomed to visit us at any time.Before we start B2B, MIC has audited our company on-spot and approved our credit. Commitment is the No.1 Point of our Enterprise's Value. Q5. Do you test all your goods before delivery? A: Yes, we have 100% test before delivery, International Authorized Third-Party Test for the products if you need are highly welcome. Q6: How to get quotation? A: We can do according to the customers' request. Pls send inquiry(such as QTY, Usage, Package) in below or your convenient way, will promptly reply in 15mins.