阅读说明：本技术 激光印刷方法 (Laser printing method ) 是由 U·莱曼 于 2019-03-08 设计创作，主要内容包括：印刷方法,其中将待印刷的基底布置在具有墨水层的墨水载体对面,通过激光束区域性照射所述墨水层,所述层通过吸收激光束而朝基底方向加速,其中为了激光吸收,所述墨水层与反射性颗粒和具有大于250000g/mol的重均(Mw)分子量的可溶性聚合物混合。(Printing process, wherein a substrate to be printed is arranged opposite an ink carrier with an ink layer which is irradiated regionally by a laser beam, the layer being accelerated in the direction of the substrate by absorption of the laser beam, wherein for laser absorption the ink layer is mixed with reflective particles and a soluble polymer having a weight average (Mw) molecular weight of more than 250000 g/mol.)

1. Printing process, wherein a substrate to be printed is arranged opposite an ink carrier with an ink layer, which is irradiated regionally by a laser beam, characterized in that the ink layer comprises reflective particles and a soluble polymer having a weight average (Mw) molecular weight of more than 250000g/mol, wherein the weight average (Mw) molecular weight of the soluble polymer is determined according to DIN 55672-2: 2016-3.

2. Printing method according to claim 1, characterized in that the soluble polymer has a weight average (Mw) molecular weight of 250000g/mol to 2500000 g/mol.

3. Printing process according to claim 1 or 2, characterized in that the soluble polymer has a weight average (Mw) molecular weight of 250000g/mol to 1500000 g/mol.

4. Printing method according to one of claims 1 to 3, characterized in that the proportion of soluble polymer is 0.05 to 2% by weight of the total ink mixture.

5. Printing process according to one of claims 1 to 4, characterised in that the proportion of soluble polymer is between 0.05 and 1% by weight of the total ink mixture.

6. Printing method according to one of claims 1 to 5, characterized in that the proportion of soluble polymer is between 0.1 and 0.8% by weight of the total ink mixture.

7. Printing process according to one of claims 1 to 6, characterised in that the soluble polymers used comprise cellulose esters, cellulose nitrates, cellulose ethers, more particularly hydroxypropylcellulose, polyurethanes or vinyl polymers.

8. Printing method according to one of claims 1 to 7, characterized in that the reflective particles consist of a metal or a metal-coated carrier material.

9. Printing process according to one of claims 1 to 8, characterised in that the reflective particles used have an average particle size of 0.1 to 10 μm.

10. Printing method according to one of claims 1 to 9, characterized in that the reflective particles used are particles having a value of L in L a b color space of more than 50, preferably more than 70, more preferably more than 80, and are particles having a value of a and/or b in L a b color space of less than +/-5, preferably +/-3.

11. Use of an ink having reflective particles and a soluble polymer having a weight average (Mw) molecular weight of more than 250000g/mol in a printing method according to one of claims 1 to 10.