{"id":303513,"date":"2024-10-19T20:44:54","date_gmt":"2024-10-19T20:44:54","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-7463-41991\/"},"modified":"2024-10-25T18:17:34","modified_gmt":"2024-10-25T18:17:34","slug":"bs-7463-41991","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-7463-41991\/","title":{"rendered":"BS 7463-4:1991"},"content":{"rendered":"

This part of ISO 9184 specifies the preparation, use and colour reactions of Graff \u201cC\u201d stain in fibre furnish analysis. It should be used in conjunction with ISO 9184-1 and, if necessary, with other staining tests defined in ISO 9184-2.<\/p>\n

The field of application of Graff \u201cC\u201d stain is very large; it allows the identification of almost all the common papermaking fibres. However, this is based upon very minute differences in the shade and strength of the colours, and accordingly calls for a great deal of training and experience. In practice, the main applications of the Graff \u201cC\u201d stain are as follows:<\/p>\n

    \n
  1. Differentiation of chemical, semi-chemical and mechanical pulps.<\/li>\n
  2. Differentiation of bleached kraft and sulfite in softwood pulps. Generally, the colour difference is sufficient for counting the fibres.<\/li>\n
  3. Differentiation of kraft and sulfite in hardwood pulps. The difference in colour is more obvious in unbleached than in bleached pulps.<\/li>\n
  4. Differentiation of softwood and hardwood pulps (except dissolving grade pulps). In kraft pulps, the colour difference is sufficient; in sulfite pulps it is somewhat weaker, although in most cases sufficient for counting.<\/li>\n
  5. Differentiation of bleached straw and esparto pulps in softwood pulps. The colour difference is distinct.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

    Fibre furnish analysis of paper, board and pulps – Method of test by Graff ‘C’ stain<\/b><\/p>\n\n\n\n\n
    Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
    BSI<\/b><\/a><\/td>\n1991<\/td>\n10<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":303519,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-303513","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/303513","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/303519"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=303513"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=303513"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=303513"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}