Gravure printing method

Patent metadata

Field	Value
Publication number	US-10960697-B2
Application number	US-201615756364-A
Country	US
Kind code	B2
Filing date	Aug 3, 2016
Priority date	Sep 18, 2015
Publication date	Mar 30, 2021
Grant date	Mar 30, 2021

Abstract

Provided is a gravure printing method by which high printing density and excellent highlight suitability are obtained, even if a gravure plate having high resolution and reduced thickness is used. The gravure printing method comprises: using an aqueous ink having a Zahn cup #3 viscosity at 20° C. of 11.0 seconds or more and 20.0 seconds or less, and having an evaporation rate of 30 mass % or less in a drying test, the drying test involving drying 1 g of the ink at a temperature of 40° C. and an air flow of 1,400 L/min for 30 minutes; and transferring 1 ml/m2 or more and 7 ml/m2 or less of the ink onto a printing medium.

First claim

The invention claimed is:

1. A gravure printing method, comprising:
using an aqueous ink having a Zahn cup #3 viscosity at 20° C. of greater than or equal to 11.0 seconds and less than or equal to 20.0 seconds, and the aqueous ink having an evaporation rate of 30 mass % or less in a drying test, the drying test involving drying 1 g of the aqueous ink at a temperature of 40° C. and an air flow of 1,400 L/min for 30 minutes; and
transferring equal to or greater than 1 ml/m 2 and less than or equal to 7 ml/m 2 of the aqueous ink onto a printing medium, wherein a total volume of gravure cells per 100 mm times 100 mm has a volume equal to or greater than 2 ml/m 2 and less than or equal to 8 ml/m 2 and each gravure cell has a depth equal to or greater than 3 μm and less than or equal to 8 μm.

2. A gravure printing method according to claim 1 , wherein a transfer ratio of the aqueous ink from a gravure cell onto the printing medium is 50% or more.

3. A gravure printing method according to claim 1 , wherein a gravure plate number is equal to or greater than 150 lines/inch and less than or equal to 350 lines/inch.

4. A gravure printing method according to claim 2 , wherein a gravure plate number is equal to or greater than 150 lines/inch and less than or equal to 350 lines/inch.

5. A gravure printing method, comprising:
using an aqueous ink having a Zahn cup #3 viscosity at 20° C. of greater than or equal to 11.0 seconds and less than or equal to 20.0 seconds, and the aqueous ink having an evaporation rate of 30 mass % or less in a drying test; and
transferring equal to or greater than 1 ml/m 2 and less than or equal to 7 ml/m 2 of the aqueous ink onto a printing medium, wherein a total volume of gravure cells per 100 mm times 100 mm has a volume equal to or greater than 2 ml/m 2 and less than or equal to 8 ml/m 2 and each gravure cell has a depth equal to or greater than 3 μm and less than or equal to 10 μm.

6. A gravure printing method according to claim 5 , wherein the evaporation rate is determined via the drying test, the drying test comprising drying 1 g of the aqueous ink at a temperature of 40° C. and an air flow of 1,400 L/min for 30 minutes.

7. A gravure printing method according to claim 5 , wherein a transfer ratio of the aqueous ink from a gravure cell onto the printing medium is 50% or more.

8. A gravure printing method according to claim 5 , wherein a gravure plate number is equal to or greater than 150 lines/inch and less than or equal to 350 lines/inch.

9. A gravure printing method, comprising:
using an aqueous ink having a Zahn cup #3 viscosity at 20° C. of greater than or equal to 11.0 seconds and less than or equal to 20.0 seconds, and the aqueous ink having an evaporation rate of 30 mass % or less in a drying test; and
transferring equal to or greater than 1 ml/m 2 and less than or equal to 7 ml/m 2 of the aqueous ink onto a printing medium, wherein a volume of all gravure cells is equal to or greater than 2 ml/m 2 and less than or equal to 8 ml/m 2 , wherein each of the gravure cells has a depth equal to or greater than 3 μm and less than or equal to 8 μm.

Assignees

• Think Labs Kk
• Kao Corp

Inventors

• Shigeta Tatsuo
• Mizushima Ryuma
• Matsumoto Yuta
• Ueda Yasufumi

Classifications

• B41M1/10 Primary

  Intaglio printing {; Gravure printing} · CPC title

• B41F13/11

  Gravure cylinders {(attaching cylindrical formes B41F27/105)} · CPC title

• B41F9/00

  Rotary intaglio printing presses · CPC title

• B41N1/06

  for relief printing or intaglio printing · CPC title

• B41F3/36

  for intaglio or heliogravure printing (proof-print presses B41F3/28) · CPC title