Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
179 words
A recording material comprising a support and a thermosensitive
element comprising silver stearate, an organic reducing agent
therefor in thermal working relationship therewith and a binder,
characterized in that said silver stearate is not associated
with mercury and/or lead ions and when said recording material
is irradiated with a copper Kα 1 X-ray source the ratio of the
sum of the peak heights of the X-ray diffraction lines
attributable to silver stearate at Bragg angles, 2Θ, of 3.62°,
5.45°, 7.30°, 9.04°, 10.97° and 12.71° to the sum of the peak
heights of the X-ray diffraction lines at Bragg angles, 2Θ, of
25.60°, 35.16° and 43.40° of NIST standard 1976, rhombohedral
Al 2 O 3 , determined with the same X-ray diffractometer in the same
state of adjustment on a sample of said recording material and a
sample of said NIST standard 1976 cut to fit a sample holder of
said X-ray diffractometer, divided by the square root of the
quantity of silver in said recording material, expressed in g
per m 2 , is greater than 2.2m/g 0.5 .
Claim 2
Dependent Claim
35 words
Recording material according to claim 1, wherein said ratio
divided by the square root of the quantity of silver in said
recording material expressed in g per m 2 is greater than
3.0m/g 0.5 .
Claim 3
Dependent Claim
18 words
Recording material according to claim 1 or 2, wherein said
thermosensitive element is provided with a protective layer.
Claim 4
Dependent Claim
33 words
Recording material according to any of the preceding claims,
wherein said thermosensitive element further comprises a
photosensitive species capable upon exposure of forming a
species capable of catalyzing reduction of said silver stearate.
Claim 5
Dependent Claim
135 words
A production process for a dispersion of particles of
substantially light-insensitive organic silver salt containing
silver stearate in a substantially solvent-free aqueous medium
comprising the steps of: i) producing an aqueous dispersion of
one or more organic acids containing stearic acid and an anionic
surfactant; ii) substantially neutralizing said organic acids
with aqueous alkali thereby forming organic acid salts
containing a stearic acid salt; (iii) adding an aqueous solution
of a silver salt to convert completely said organic acid salts
into their silver salts containing silver stearate,
characterized in that said anionic surfactant is present in a
molar ratio with respect to organic acid greater than 0.15 and
said silver salt is added to produce organic silver salt(s) at a
rate between 0.025mol/mol organic silver salt(s) · min and
2.25mol/mol organic silver salt(s) · min.
Claim 6
Dependent Claim
21 words
Production process according to claim 5, wherein said anionic
surfactant is an alkali or ammonium salt of an alkaryl sulfonic
acid.
Claim 7
Dependent Claim
27 words
Production process according to claim 6, wherein said alkali or
ammonium salt of an alkylarylsulfonic acid is an alkali or
ammonium salt of an alkylbenzene sulfonic acid.
Claim 8
Dependent Claim
31 words
Production process according to any of claims 5 to 7 further
comprising the step of subjecting said dispersion of particles
of substantially light-insensitive organic silver salt(s)
containing silver stearate to ultrafiltration.
Claim 9
Dependent Claim
19 words
Particles of substantially light-insensitive organic silver salt
containing silver stearate producible according to any of claims
5 to 8.
Claim 10
Dependent Claim
64 words
A recording process comprising the steps of: (i) bringing an
outermost layer of a recording material according to any of
claims 1 to 3 into proximity with a heat source; and (ii)
applying heat from said heat source imagewise to said recording
material while maintaining proximity to said heat source to
produce an image; and (iii) removing said recording material
from said heat source.
Claim 11
Dependent Claim
16 words
Recording process according to claim 10, wherein said heat
source is a thin film thermal head.