即日起(2022/4/21)，我們的油畫布升級為英國倫敦藝術品貿易公會認證，最高等級的油畫布，這認證代表，在該公會的實驗下，可以達到最高等級的印刷品顯示持久度，百年以上的收藏。
畫布需要是無酸材質，沒有螢光增白劑(OBAs, Optical Brightening Agents)，螢光增白劑雖然會讓布變白，但是時間一久會慢慢變黃，一般的紙材都有這樣的狀況，而我們這款油畫布厲害就在沒有螢光增白劑，但是卻可以達到更好的白色，布維持純白很重要，因為這樣印刷出來，才不會色偏，可以有良好的顏色表現，通常這樣高品質的材質，是使用於藝術畫印刷。
- 沒有螢光增白劑(Optical Brightening Agents)，無酸。
- 百年以上保存展示，實驗認證。
為什麼我們可以用實惠的價格，提供世界最高等級的畫布呢？因為我們是直接和歐美原廠接洽進口，沒有經過代理商，一次大量進貨，所以原廠可以給我們相當優惠的價格，我們也才能以實惠的價格提供最高品質的產品，nuPhoto拍立洗的產品幾乎都是以這樣的方式在進貨，另外，我們是自己的工廠生產，自己進貨、印刷、製造，才能控管好品質，達到平價高質感。
而這款畫布的特色，表面的紋理細緻光彩，顏色表現優異，有皮革般的觸感，防潑水，不易因潮濕產生問題，而且畫布很硬挺厚實，超過400gsm，可以耐久保存，不是他牌便宜油畫布可以比擬的。
我們總共有5種框畫產品，可以到這裡比較一下。
英國 FINE ART TRADE GUILD 網站 成立於1910，超過百年的歷史。
註: 實驗條件下推測可以收藏超過百年，但實際畫布顏色表現狀況，還是依現場環境光照而有影響，建議放於室內，不要照射到陽光，目前沒有印刷和布料可以抵擋長時間的陽光照射。
以下為英文說明，認證內容和測試方式。
ARCHIVAL CERTIFIED GICLÉE PRINT
THIS CERTIFICATE SERVES TO CONFIRM THAT WHEN PRODUCED ACCORDING TO MANUFACTURER’S RECOMMENDATIONS THE FOLLOWING FINE ART PRINT MEETS THE ARCHIVAL STANDARDS SET FORTH BY FINE ART TRADE GUILD FOR PH AND LIGHTFASTNESS AS ENUMERATED IN THEIR BLUE WOOL TEST.
Key Requirements of the Blue Wool Testing
Lightfastness of finished print – results of 6 or more on the Blue Wool Scale in all areas of the print – or its equivalent under empirical test conditions. Guild standard pH for substrate of 7-9, amended September 2002 to pH 7-10 Minimum weight of substrate of 250gsm
Blue Wool Testing
Standards Standards for blue wool testing are defined by: ASTM D5383-97 Standard practice for visual determination of the lightfastness of Art Material by Art Technologists Results Blue Wool 6 = 100 years display life
Blue Wool Scale
Measures and calibrates the permanence of prints. Two identical test prints are created. A calibrated blue wool test strip is masked (1/2). The strip and one test print are placed under xenon lamps in accordance with the test standards. The other print is stored in the dark as a control. At various times, the test print is compared to the control print. When visible fading is evident the wool test strip is examined. The amount of the fading is then measured by comparison to the original color and a rating between 0 and 8 is awarded. Zero denotes extremely poor colour fastness while an Eight rating is deemed not to have altered from the original and thus credited as being lightfast and permanent. Blue Wool 6 is the accepted standard for limited edition prints.