{"id":28337,"date":"2026-09-28T19:47:43","date_gmt":"2026-09-28T16:47:43","guid":{"rendered":"https:\/\/artrestorationsupplies.gr\/?post_type=product&#038;p=28337"},"modified":"2026-09-28T19:49:44","modified_gmt":"2026-09-28T16:49:44","slug":"llfa-blue-wool-%ce%ba%ce%bb%ce%af%ce%bc%ce%b1%ce%ba%ce%b5%cf%82-%ce%bc%cf%80%ce%bb%ce%b5-%ce%bc%ce%b1%ce%bb%ce%bb%ce%b9%ce%bf%cf%8d-%ce%b3%ce%b9%ce%b1-%ce%ad%ce%bb%ce%b5%ce%b3%cf%87%ce%bf","status":"publish","type":"product","link":"https:\/\/artrestorationsupplies.gr\/en\/product\/llfa-blue-wool-%ce%ba%ce%bb%ce%af%ce%bc%ce%b1%ce%ba%ce%b5%cf%82-%ce%bc%cf%80%ce%bb%ce%b5-%ce%bc%ce%b1%ce%bb%ce%bb%ce%b9%ce%bf%cf%8d-%ce%b3%ce%b9%ce%b1-%ce%ad%ce%bb%ce%b5%ce%b3%cf%87%ce%bf\/","title":{"rendered":"LLFA Blue Wool \u2013 Blue Wool Scales for Lightfastness Testing ISO 105"},"content":{"rendered":"<p>The blue wool scale is a measure of the lightfastness of organic materials and a visual light \u00abdosimeter\u00bb for exhibitions. Half of the surface must be covered with aluminium foil for comparison, and after the exposure period the colour change is compared.<\/p>\n<ul>\n<li><strong>Blue Scales (card):<\/strong> 8 fabric strips dyed with blue dyes of different lightfastness \u2013 each strip roughly twice as resistant as the previous one; card 13\u00d74.5 cm<\/li>\n<li><strong>Type 1 test sheet (25\u00d715 cm):<\/strong> the most sensitive lightfastness level; dyed cotton, cut to the required size; to ISO 105 B01-B05<\/li>\n<li><strong>Type 2 test sheet (25\u00d715 cm):<\/strong> the second most sensitive level<\/li>\n<li>There is no exact correspondence between fading and a specific light dose (Mlx\u00b7h); many exhibits are more sensitive than the least resistant strip<\/li>\n<\/ul>\n<p class=\"ars-imp\"><strong>Made to order \u00b7 imported from abroad.<\/strong> This product is ordered from the manufacturer. The price already includes shipping; we confirm the delivery time by email before payment.<\/p>","protected":false},"excerpt":{"rendered":"<p>Blue wool scales for determining the effect of light on paintings, documents and textiles: 8-strip cards and type 1 and 2 test sheets to ISO 105 B01-B05.<\/p>","protected":false},"featured_media":28341,"template":"","meta":[],"product_brand":[1326],"product_cat":[1166,1177],"product_tag":[],"class_list":["post-28337","product","type-product","status-publish","has-post-thumbnail","product_brand-llfa","product_cat-1166","product_cat-1177","first","onbackorder","taxable","shipping-taxable","product-type-variable"],"_links":{"self":[{"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product\/28337","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/types\/product"}],"version-history":[{"count":1,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product\/28337\/revisions"}],"predecessor-version":[{"id":28448,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product\/28337\/revisions\/28448"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/media\/28341"}],"wp:attachment":[{"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/media?parent=28337"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product_brand?post=28337"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product_cat?post=28337"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/artrestorationsupplies.gr\/en\/wp-json\/wp\/v2\/product_tag?post=28337"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}