Abstract: An identification document which includes card specific information printed on the card in a first location at a relatively large scale which permits the information to be read without magnification and duplicates the card specific information at a second location on the card at a significantly smaller scale which requires magnification to clearly read the small scale information. The micro-printing of small scale card specific information, such as a person's date of birth on a driver's license, at a second location on the identification card allows the micro-printed text to be compared to the large scale text to determine if the large scale text has been altered.

Abstract: An identification document which includes card specific information printed on the card in a first location at a relatively large scale which permits the information to be read without magnification and duplicates the card specific information at a second location on the card at a significantly smaller scale which requires magnification to clearly read the small scale information. The micro-printing of small scale card specific information, such as a person's date of birth on a driver's license, at a second location on the identification card allows the micro-printed text to be compared to the large scale text to determine if the large scale text has been altered.

Abstract: A ferritic stainless steel having improved impact properties contains between about 21% and about 30% chromium, up to about 5% molybdenum, up to about 6% nickel, between about 0.1% and about 0.4% niobium, between about 0.1% and about 0.75% aluminum, up to about 0.3% titanium, up to about 0.025% carbon, up to about 0.035% nitrogen, and the balance essentially iron and incidental impurities. The ferritic stainless steels of the present invention are particularly useful in welded structures because the weld metal displays superior impact properties.

Abstract: A solar collector plate made of stainless steel or a metal having a nickel-flash coating is immersed in a molten dichromate salt bath at a temperature between about 375.degree. C. and about 500.degree. C. sufficiently long to provide a selective oxide coating which has a Figure of Merit of at least about 4. The oxide coating is continuous, has a microscopically nodular texture with the average nodule size being at least about 5000 A and displays a Figure of Merit of at least about 4.