Adjusting gloss for a print image
View Patent ↗Adjusting a gloss for a print image by adjusting the cooling of the print image. Further, a toner for a printing press adjusting gloss by adjusting cooling includes 1% to 30% aliphatic hydrocarbons, aliphatic acids, aliphatic alcohols or their salts, or olefinic hydrocarbons.
1. A method for adjusting a gloss for a print image, comprising: adjusting the gloss of a print image by adjusting the cooling of the print image, wherein for an essentially constant gloss of a print image to occur, a cooling rate below a value which is dependent on a predetermined print material and a predetermined toner is chosen.
2. The method according to claim 1 , wherein a toner used is heated prior to the cooling procedure from around 80° C. to 140° C., but preferably from 110° C. to 135° C.
3. The method according to claim 1 , wherein for an increase of the gloss of a print, image to occur, a cooling rate above a value, which is dependent on the print material and a predetermined toner is chosen.
4. A fusing device for a printing press, having a heating device for heating a toner including 1% to 30% aliphatic hydrocarbons, aliphatic acids, aliphatic alcohols or their salts or olefinic hydrocarbons on a print material, comprising: a cooling device, and a control unit for adjustably cooling a print image wherein the gloss of the print image is adjusted, wherein the toner has the value of an elastic module G′ at a reference temperature value, computed from the initial temperature at the start of the glass transition of the tones plus 50° K, i.e., (G′(reference temperature value)/G′(reference temperature value +50° K)) of less than 10 −5 .
5. The toner for a printing press according to claim 4 , wherein the toner includes 5% to 25% of the aliphatic hydrocarbons, aliphatic acids, aliphatic alcohols or their salts, or the olefinic hydrocarbons.
6. The toner for a printing press according to claim 5 , wherein the toner includes 10% to 20% of the aliphatic hydrocarbons, aliphatic acids, aliphatic alcohols or their salts, or the olefinic hydrocarbons.
7. The toner according to claim 4 , wherein the toner includes 15% to 25% of the aliphatic hydrocarbons, aliphatic acids, aliphatic alcohols or their salts, or the olefinic hydrocarbons.
8. The toner according to claim 4 , wherein the toner includes at least a resin, particularly a polyester resin.
9. The toner according to claim 4 , wherein the toner includes at least a pigment or a dyestuff.
10. The toner according to claim 4 , wherein the toner includes at least a material for forming an electrical charge.
11. The toner according to claim 4 , wherein the toner contains at least a flow expedient or a solvent.