[Histonet] little things in histology

[WWmn916 <@t> aol.com]

hello everyone
 
two little detail questions
1) could soaking prefaced paraffin blocks a little too long in ammonia water 
effect the h+e staining of that slide causing a muddy h+e?
2)could leaving slides in 65-70 degree oven (about 30-45 minutes or longer) 
cause heat artifact and muddy the h+e stain?
 
thanks
deb king



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