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BuKePrinting >> Bookprinting >> 畫冊印刷廠油墨結晶

畫冊印刷廠油墨結晶

From:Buke printing factory of China | Author:China Bukeprinting factorybook0755 | Published time: 2021-04-26 | 1197 Views | Share:
填料在熱敏油墨中是以一種輔助材料的形式存在的，有些填料可使墨膜顏色算艷，穩定、色調均勻。調節變色顏料的變色溫度並能改善油墨的附著力。

              畫冊印刷廠油墨結晶


表現的顏色變化要溶後於溫度變化，而晶型快復過程要比改變過程中的顏色變化滯後現象更為明顯。應用此類型油墨時要註意到這一特性，

溫度升高不能過快，否則膜顏色與溫度之間的對應關系會出現較大的誤差pH值變化：某些物質與高級脂防酸混合，在一定溫度下，

酸中離解出的羧酸分子活化與某種物質作用出現明顯的顏色變化：一旦冷卻，羧酸分子復原，物質顏色亦隨之復原。

例如，硬脂酸與溴酚藍在5℃時顏色由黃色變藍色，發生變色，冷卻到室溫顏色又復原。

②填料、填料在熱敏油墨中是以一種輔助材料的形式存在的，有些填料可使墨膜顏色算艷，穩定、色調均勻。調節變色顏料的變色溫度並能改善油墨的附著力。為此應選用耐熱較強的白色粉末狀填料。

填料的品種及用量對熱敏油墨的變色性能有影響，填料在溫度變化時，某些活化元素變色顏料能起催化或抑製作用，可導致變色溫度升高或降低，在製造熱敏油墨時應註意。

③連結料，連結料也是熱敏油墨的重要組成部分，要求耐溫性好、附著力強，顏色淺而且不與顏料組分起化學反應。連結料所用的樹脂種類和用量對顏色示溫效果也不同，

因此要根據油墨綜合性能選用熱敏油墨的連結料。

畫冊印刷廠油墨結晶
畫冊印刷廠油墨結晶

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