Maleic anhydride will give you a brief introduction to problem analysis and attention to carbon free carbon paper:

無碳復寫紙是一種具有直接復印和直接顯色功能的無色復印紙。它的顯色主要是：在外力的作用下，力敏感顏料和微膠囊中的油溶液溢出并與顯色劑接觸，引起染色反應，從而起到改寫的作用。

Carbon free copy paper is a kind of colorless copy paper with direct copy and direct color development functions. Its color development is mainly: under the action of external force, the oil solution in force sensitive pigment and microcapsule overflows and contacts with the color developer to cause dyeing reaction, so as to play the role of rewriting.

無碳復寫紙是一種用途廣泛的產(chǎn)品，尤其是在公司財務部門為收據(jù)開具發(fā)票時。購買時，請嘗試在中下層購買一個三層紙的商標，以使成分相同，不會引起色差的現(xiàn)象。并且日期不要間隔太長，因為各個制造商的產(chǎn)品在白度，色密度，光滑度，厚度，剛度，印刷表面抗張強度，彩色紙的色調，緊密度，油墨吸收性等方面均不統(tǒng)一指標。相同，因此我們必須購買具有相同制造商日期間隔的產(chǎn)品。

Carbon free carbon paper is a widely used product, especially when the company's financial department issues invoices for receipts. When buying, please try to buy a trademark of three-layer paper brand in the middle and lower layers, so that the ingredients are the same and will not cause color difference. And the production date should not be too long, because the products of various manufacturers have different indicators in whiteness, color density, smoothness, thickness, stiffness, tensile strength of printing surface, hue, compactness and ink absorption of color paper. The same, so we must buy products with the same manufacturer date interval.

順丁烯二酸酐

Maleic anhydride

還應注意表面強度，以確定是否掉落了粉末，是否掉落了頭發(fā)并產(chǎn)生了糊狀物；無碳復寫紙的不透明性可以減少膠印；紙張的均勻性可以減少印刷皺紋；光滑度決定了打印壓力和墨水量。

Attention should also be paid to the surface strength to determine whether powder has fallen, whether hair has fallen and paste has been produced; The opacity of carbon free copy paper can reduce offset printing; The uniformity of paper can reduce printing wrinkles; Smoothness determines the printing pressure and ink volume.

無碳紙在紙上有涂層，在紙的兩面都有涂層，在下部紙上有涂層。因此，使用時要注意方向性，否則會造成不可逆的書寫。組件上的濕氣導致原紙變形和涂層損壞，因此無法重寫。如果溫度太低，將影響顯色速度，但不會影響顯色效果。建議為票證使用專用墊板，以便在書寫壓力下可以增強顯色效果并防止重寫到下一組。

Carbon free paper has a coating on the paper, a coating on both sides of the paper, and a coating on the lower paper. Therefore, pay attention to directionality when using, otherwise it will cause irreversible writing. Moisture on the component causes deformation of the base paper and damage to the coating, so it cannot be rewritten. If the temperature is too low, it will affect the color development speed, but will not affect the color development effect. It is recommended to use special backing plates for tickets so that the color rendering effect can be enhanced under writing pressure and rewriting to the next group can be prevented.