What is BS 2782-4: Method 470C - Ash of unplasticized cellulose acetate about? 
BS 2782-4 discusses the Method 470C for determination of ash of unplasticized cellulose acetate.
Method 470C is one of a series of methods described in BS 2782-4 for testing chemical properties of plastics.
BS 2782-4: Method 470C specifies a method for determining the ash, consisting of inorganic residue, yielded by unplasticized cellulose acetate.
BS 2782-4: Method 470C applies to unplasticized cellulose acetate free of additives, fillers, dyes or other materials which may affect the result.
The ash content at 575 ± 25 °C is a reasonable measure of the mineral salts and inorganic foreign
matter in the cellulose acetate. The weight of ash obtained varies with the temperature of ignition. Higher temperatures such as 850 °C will convert calcium carbonate and other carbonates to the oxides and thus give lower values for the ash. The composition of ash may vary with the pulping process used in manufacture, which limits the significance of the ash determination in absolute terms.
Who is BS 2782-4: Method 470C - Ash of unplasticized cellulose acetate for? 
BS 2782-4: Method 470C on ash of unplasticized cellulose acetate is relevant to: 
- Manufacturers of thermosetting materials
- Manufacturers of cellulose acetate
- The plastic industry
- Product designers
- Product development teams
- Quality control and testing authorities
Why should you use BS 2782-4: Method 470C - Ash of unplasticized cellulose acetate?
Testing the chemical properties of plastics is essential when it comes to determining the performance and workability of the material and whether it is fit for the intended end-product use. In this regard, cellulose that is to be employed for chemical purposes, should have a minimum ash content.
BS 2782-4: Method 470C provides the best industry guidance on test procedures to determine ash of unplasticized cellulose acetate.
BS 2782-4: Method 470C also covers guidance on number of determinations to be taken into account.
As a result, testing in compliance with BS 2782-4: Method 470C can provide an evaluation of the degree of contamination in the cellulose acetate. It can also be beneficial for quality control and product development purposes.
