Composite paint of projection screen and preparation method for projection screen

A preparation method for a projection screen, comprising:

• S1:
• preparing a projection screen substrate having a plurality of prism microstructures, each of the plurality of prism microstructures having a first flat surface and a second flat surface that intersect with each other;
• S2:
• coating one paint of a light-absorbing paint and a reflective paint on a side of the projection screen substrate with the plurality of prism microstructures, photocuring the one paint on the first flat surfaces, and after the photocuring is completed, washing away the one paint on the second flat surfaces using a cleaning solvent;
• and
• S3:
• coating the other paint of the light-absorbing paint and the reflective paint on the side of the projection screen substrate with the plurality of prism microstructures, photocuring the other paint on the second flat surfaces, and after the photocuring is completed, washing away the other paint on the first flat surfaces using a cleaning solvent,
• wherein the light-absorbing paint comprises following components:
• 28-32 parts by weight of acrylate;
• 28-32 parts by weight of an active diluent;
• 1-3 parts by weight of a photoinitiator;
• 1-3 parts by weight of a black pigment;
• 20-28 parts by weight of a solvent;
• and
• 1-5 parts by weight of an aid,
• the reflective paint comprises following components:
• 28-32 parts by weight of acrylate;
• 28-32 parts by weight of an active diluent;
• 1-3 parts by weight of a photoinitiator;
• 18-23 parts by weight of an aluminum silver powder;
• 26-32 parts by weight of a solvent;
• and
• 1-5 parts by weight of an aid, and
• wherein the photoinitiator is a compound with an initiating activity under ultraviolet light or visible light.