Reply to thread

Message

<blockquote data-quote="Olgar Shiverstone" data-source="post: 4298928" data-attributes="member: 5868">You know, I bet a conversation with the printer's quality engineers would be fascinating.In the area I work, we have products that are painted to some very exacting specifications, and getting the paint right is a really difficult process.&nbsp; Just changing paint batches can be a headache, and small variations in temperature and humidity at the plant can cause paint application to go all wacky until they figure out the precise flow rate and droplet size to use.&nbsp; Changing from VOC to non-VOC paint was a six month ordeal.It could be their basic process is sound, but if ink is anything like paint, they could have variations within a day's print run just due to the natural variation of temperature in humidity at the printing location (which is possible even in a closed indoor facility unless they take extreme pains in climate control).&nbsp; I wonder if the conditions of ink dry at the printer could make given sub-lots more or less susceptible to the oils in peoples' hands.&nbsp; If the process is subtle enough, it might not show up in an early print sample -- you'd have to do regular testing to catch it.</blockquote>

[QUOTE="Olgar Shiverstone, post: 4298928, member: 5868"] You know, I bet a conversation with the printer's quality engineers would be fascinating. In the area I work, we have products that are painted to some very exacting specifications, and getting the paint right is a really difficult process. Just changing paint batches can be a headache, and small variations in temperature and humidity at the plant can cause paint application to go all wacky until they figure out the precise flow rate and droplet size to use. Changing from VOC to non-VOC paint was a six month ordeal. It could be their basic process is sound, but if ink is anything like paint, they could have variations within a day's print run just due to the natural variation of temperature in humidity at the printing location (which is possible even in a closed indoor facility unless they take extreme pains in climate control). I wonder if the conditions of ink dry at the printer could make given sub-lots more or less susceptible to the oils in peoples' hands. If the process is subtle enough, it might not show up in an early print sample -- you'd have to do regular testing to catch it. [/QUOTE]

Verification