I had high hopes for this 6x9 inch envelope to use to send issues of my high school class newsletter through the mail but I quickly found that it was practically unprintable with a laser printer that almost every organization and small business uses. Yes these envelopes are economical & easy to use but addresses that are printed with a laser printer on them are so light gray really--not black at all--that I am afraid that the US Post Office's machines that automatically read printed addresses may not be able to read them. And the weak light grayness of the laser-printed addresses on these envelopes leave a very poor impression of the organization or business that sends them. The catalog description of these envelopes and the boxes they come in nowhere on either say anything at all about whether or not they are intended for use on inkjet OR laser printers. Nowhere are printers mentioned at all so Staples is certainly guilty of not giving customers who want to print such envelopes proper guidance in the selection of this product. I certainly cannot recommend these envelopes to anyone who wants to print them by laser printer. (I do not know of their printability on an inkjet printer.) I am very disappointed that Staples whose products I have used with satisfaction for years prior to this is so careless in the presentation to their customers of an otherwise fine product.
I use these twice a month to send out mailings to over 100 people and this is all done by hand. I put the envelopes in my personal HP 3310 Fax scanner copy printer and they don't jam at all if you only put in 12 at a time. I find if I use any other envelope or over this amount they jam and then then you will have to reprint some of them.