irwin priest deane judd (2 risultati)

Paperback. Condizione: New. Print on Demand. This book reports on the results of a standardization investigation of the 35-yellow Lovibond glasses calibrated by the National Bureau of Standards. The findings of the investigation revealed that there are uncertainties inherent in the nature of the glasses themselves, which makes obtaining precision and reliability in calibration impossible. The glasses were found to depart from ideal color standards due to imperfections such as surface waviness, scratches, and striae. These imperfections introduce significant uncertainty to spectral transmission and affect judgments of hue and saturation. Additional uncertainty comes from the approximate equivalence of red and yellow at 35Y, where small differences in either color can result in an incorrect match. The full spectral transmission of eight glasses was determined, and empiric formulas were derived to predict the yellow scale numeral based on purity and the sunlight transmission based on visibility. The author concludes that the results of this study can be used to identify glasses that more closely approximate standard 35Y, but that more reliable and precise grading methods are needed to take full advantage of the standardization. This book with insights into the limitations of the 35-yellow Lovibond glasses is an essential reference for color scientists, the oil industry and oil chemists, and anyone working with color standards. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.

LeatherBound. Condizione: New. BOOKS ARE EXEMPT FROM IMPORT DUTIES AND TARIFFS; NO EXTRA CHARGES APPLY. LeatherBound edition. Condition: New. Reprinted from 1929 edition. Leather Binding on Spine and Corners with Golden leaf printing on spine. Bound in genuine leather with Satin ribbon page markers and Spine with raised gilt bands. A perfect gift for your loved ones. Pages: 38 NO changes have been made to the original text. This is NOT a retyped or an ocr'd reprint. Illustrations, Index, if any, are included in black and white. Each page is checked manually before printing. As this print on demand book is reprinted from a very old book, there could be some missing or flawed pages, but we always try to make the book as complete as possible. Fold-outs, if any, are not part of the book. If the original book was published in multiple volumes then this reprint is of only one volume, not the whole set. Sewing binding for longer life, where the book block is actually sewn (smythe sewn/section sewn) with thread before binding which results in a more durable type of binding. Pages: 38 Volume Bureau of Standards Journal of Research, 2, No. 4 , p. 793. Research Paper 58 (RP58).