Minnesota Mining and Manufacturing Company

Ronald E Watts

Steven Swain

An imaging method capable of producing high-resolution full color images on substrates such as flexible plastics sheets to form weatherable signs for exterior display, the method comprising:

Electrophotographic imaging method involves stripping transferred toner

A photothermographic element comprising a substrate having coated thereon a photothermographic medium comprising a binder having dispersed therein an organic silver salt or complex, a photocatalyst and a reducing agent, characterized in that the photothermographic medium contains as an antifoggant, in the absence of mercury compounds, an effective antifogging amount of a compound of the general formula: ##STR1## characterized in that: X.sup.1 and X.sup.2 independently represent halogen atoms,

Photothermographic materials

A composition which forms a hair bleaching solution when mixed with water comprising: hydrogen peroxide liberator, ammonia liberator, thickener and alkaline compound. A bleach accelerator and heavy metal complexing agent are preferably used in this composition.

Dry solids mixed for hair bleaching compositions

An effective thickening agent comprises particulate matter of less than 425 microns when said particulate matter comprises silica particles bonded to an acrylic polymer capable of hydrogen bonding.

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Bishops Stortford, United Kingdom

Ronald E Watts