Sharon Osborn B.S., HT(ASCP)CT observes:
>>I worked with pathologists who would use blueing to mark the margins. 
Perhaps your pathologist is confusing starch with blueing. Both are regular 
laundry products and often were used in rinse water. You might get some 
laundry blueing (used to whiten whites, etc) and try it for him.<<

Well, any pathologist who doesn't know the difference between starch and 
bluing didn't spend enough time in his (or even her) mamma's kitchen when he 
was growing up. - Interestingly, the same people who make Mrs. Stewart's 
blueing make the Davidson marking inks, which anyone who uses more than one 
color of marking ink should be using. See
www.bradleyproducts.com

Bob Richmond
Samurai Pathologist
Knoxville TN