An offset printing process for manufacturing a laser markable packaging uses a laser markable offset ink and a laser markable varnish or a laser markable dispersion-lacquer in the process to provide a laser markable image or area on the packaging. The laser markable offset ink, offset varnish or offset dispersion-lacquer including a leuco dye and a metal free optothermal converting agent may be used in the offset printing process.

This heat-sensitive recording material is configured to contain, as a color-developing compound, at least one compound represented by one of formulas (1)-(3): ##STR00001##

Color change compositions that transition from a first to second color state upon application of an applied stimulus are provided. Also provided are substrates having the compositions on a surface thereof, as well as methods of making and using the compositions.

The present invention relates to an N,N-diarylurea derivative represented by the following general formula (1) and a method for producing the same. In addition, the present invention relates to a thermosensitive recording material in which a thermosensitive recording layer including a basic dye which is colorless or lightly colored at room temperature and a developer capable of developing color upon contact with the basic dye by heating is provided on a base sheet, wherein the developer is the N,N-diarylurea derivative represented by the following general formula (1):

##STR00001##

(wherein R2 is an alkyl group, an aralkyl group, or an aryl group; and Al is a hydrogen atom or an alkyl group).

Provided is a thermosensitive recording medium including a support and a thermosensitive recording layer disposed on or above the support. The thermosensitive recording layer include a compound represented by General Formula (1) and a styreneacryl resin, where, in General Formula (1), R.sub.2 is a C1-12 straight-chain, branched-chain, or alicyclic alkyl group, C7-12 aralkyl group that is substituted with a C1-12 alkyl group, a C1-12 alkoxy group, a C6-12 aryl group or a halogen atom, or a C6-12 aryl group that is unsubstituted or substituted with a C1-12 alkyl group, a C1-12 alkoxy group, a C6-12 aryl group, or a halogen atom, where two or more R.sub.2 may be identical to or different from each other; and A.sub.1 is a hydrogen atom or a C1-4 alkyl group, where two or more A.sub.1, may be identical to or different from each other.

##STR00001##

Use of N-(p-toluenesulfonyl)-N-(3-p-toluenesulfonyl-oxy-phenyl)urea with an X-ray diffraction pattern with Bragg angles (2?/CuK.sub.?) of 10.3, 11.0, 12.9, 13.2, 15.4, 17.1, 18.0, 18.2, 19.4, 20.0, 20.7, 21.2, 23.0, 24.9, 25.3, 26.5, 26.8, 27.5, 30.7, 32.7 as a colour developer in a heat-sensitive recording material comprising a carrier substrate, a heat-sensitive colour-forming layer which is applied to one face of the carrier substrate and which contains at least one non-phenolic colour developer and at least one colour former, and an adhesive layer and/or a coating in order to allow rear-face printing using conventional printing methods on the carrier substrate face facing away from the heat-sensitive colour-forming layer, so as to limit the loss of image density and/or the relative print contrast and/or the reduction of the area-based colour developer quantity, wherein, with a value of ?1.20 optical density units for the heat-sensitive recording material stored in accordance with the migration test defined in the description, the image density equals at least 35% of the value of the image density prior to storage and/or the relative print contrast of the heat-sensitive recording material stored in accordance with the migration test equals at least 70% of the value of the relative print contrast prior to storage and/or the area-based colour developer quantity of the heat-sensitive recording material stored in accordance with the migration test equals at least 30% of the area-based colour developer quantity prior to storage.

The invention relates to a heat-sensitive recording material, comprising a supporting substrate and a heat-sensitive color-forming layer, which contains at least one color former and at least one phenol-free color developer, characterized in that the at least one color developer is a compound of formula (I), wherein Ar is an aryl residue, a heteroaryl residue, or a benzyl residue and Y is an aryl residue, a heteroaryl residue, a benzyl residue, an aryloxy residue, a heteroaryloxy residue, a benzyloxy residue, an arylamino residue, a heteroarylamino residue, or a benzylamino residue. The invention further relates to a method for producing said heat-sensitive recording material. ##STR00001##

The disclosure provides a novel crystal form of N-(2-(3-phenylureido)phenyl)benzenesulfonamide, which is crystalline modification thereof specified by an X-ray diffraction diagram having peaks at diffraction angles (20.1) of 23.60, 20.80, 12.24 and 13.80 in a powder X-ray diffractometry using Cu-K ray.

A color developing composition which develops colors in a high density and does not significantly discolor when aged, a lithographic printing plate precursor which has excellent plate-inspecting properties by means of color development and is capable of maintaining strong color development even when aged after color development, a plate making method for a lithographic printing plate in which the lithographic printing plate precursor is used, and a new compound that can be preferably used as a color developer. The color developing composition of the present invention includes a compound represented by Formula 1. The compound in the present invention is represented by Formula 1. In Formula 1, R.sup.1 represents a group in which an R.sup.1O bond is cleaved by heat or exposure to infrared rays. ##STR00001##

The invention relates to a self-adhesive, heat-sensitive recording material, comprising a carrier substrate, a heat-sensitive, color-forming layer that is applied on one side of the carrier substrate and contains at least a non-phenolic color developer in and at least one color former, a siliconized layer on the upper side of the heat-sensitive, color-forming layer that is applied on the carrier substrate, as well as an adhesive layer on the side of the carrier substrate facing away from the heat-sensitive, color-forming layer.