Method of producing pressure-sensitive copying sheets
AssigneeFuji Photo Film Co., Ltd.
InventorsMasao Kanda, Makoto Yoshida
Life of this patent
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Abstract
A method for producing a pressure-sensitive copying sheet which comprises winding the pressure-sensitive copying sheet having a microcapsule coating film comprising microcapsules having an average particle size of 3-8 microns and a hydrophobic oil containing 3-6% by weight of a color former at 35 kg/m or less, and while winding continuously reducing the winding tension to an amount of about 40 to 70% of the initial winding tension as the roll diameter increases. An embodiment is also disclosed where said coating contains an antismudging and/or a covering agent and the initial winding tension is 70 kg/m or less.
Claims10
A method of producing pressure-sensitive copying sheets which comprises winding a pressure-sensitive copying sheet having a microcapsule coating comprising microcapsules which have an average particle size of 3 to 8 microns and which contain a hydrophobic oil containing 3-6% by weight of a color former at an initial winding tension of 35 kg/m or less at the minimum roll diameter and, while winding, continuously reducing the winding tension to an amount of about 40 to 70% of the initial winding tension at said minimum roll diameter as the diameter of the roll increases.
A method of producing pressure-sensitive copying sheets which comprises winding a pressure-sensitive copying sheet having a microcapsule coating comprising microcapsules which have an average particle size of 3-8 microns and which contain a hydrophobic oil containing 3-6% by weight of a color former, an antismudging agent and/or a covering agent at an initial winding tension of 70 kg/m or less at the minimum roll diameter, and, while winding, continuously reducing the winding tension to about 40-70% of the initial winding tension at said minimum roll diameter as the roll diameter increases.
Dependencies are inferred from the claim text.