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US 4,066,805 AGranted
Method of achieving a two-toned fiberboard product
AssigneeArmstrong Cork Company
InventorJay D. Shenk
Life of this patent
Estimating the term…
Abstract
Mineral or wood fiberboard is provided with a disrupted or embossed decorative surface, painted overall with a paint containing yellow pigment grade ferric oxide pigment, and the high areas contacted with a heated surface at a temperature such that the ferric oxide pigment is heated to drive off the water of hydration and convert it to a red ferric oxide, thus achieving a two-toned decorative painted board product.
Claims4
The method of forming a textured fiberboard product having a series of peaks or lands and intervening valleys and having a two-toned painted surface which varies from a brown to a deeper redish tone comprising:
- a. forming a textured fiberboard having a series of peaks or lands and intervening valleys;
- b. painting the textured surface overall with a liquid coating containing a yellow hydrated ferric oxide pigment to form an overall brown coating;
- c. contacting said peaks or lands with a heated surface at a temperature and for a time sufficient to drive off the water of hydration associated with the yellow hydrated ferric oxide pigment, thus converting the yellow ferric oxide to a red ferric oxide to provide the peaks or lands with a darker reddish hue contrasting with the original brown color of the unaffected coated valleys;
- and thereafter
- d. drying the coated fiberboard.
2 more elements
Dependencies are inferred from the claim text.