The Herald Statesman reports on Dec. 1944 on its first page that Polychrome Corporation with its 100 employees will move to the southeast corner of Alexander and Ashburton Ave. Polychrome Corporation will consolidate 4 of its plants and make its headquarter here around Jan 1, it said. Polychrome had its headquarter in New York City and its mimeographic stencil and specially coated insulating paper are said to be mostly (80%) for the war effort.
Please click the following ling to read the actual article. You can also read the 2nd page by changing the last number from 7 to 8.
http://fultonhistory.com/newspaper%2010/Yonkers%20NY%20Herald%20Statesman/Yonkers%20NY%20Herald%20Statesman%201944%20Grayscale/Yonkers%20NY%20Herald%20Statesman%201944%20Grayscale%20-%201217.pdf
Thank you Doug Chu (Simon's son and Chu family historian) for supplying this information.