This is nothing new, but the first time I experienced it....Bead Color Dye Lots.
When I graphed out this cell phone bag, using the beads I have in my storage, it was apparent that an order of additional beads would be necessary. I was using DB332, Matt Metallic Rhodium Plated, for the majority background color, on this panel. I knew there wouldn't be enough. My stash has almost every color, but the gram count is not always enough to complete my new weaving. When ever I ran into a count problem, I would place the replenishing order, close to when I need more beads. Never a problem in all the years I have been doing practice this way.
This time, when I did, I found they were 'discontinued'!!!!! So, I do what I usually do, cruise the back allies for left overs! I found more tubes, but expensive. 4gram tubes @ $10.50 a tube. I had to do it though, buying 4 more.
Only after I turned my panel, when finished the last row and still on the loom, did I notice a slight color difference, mainly from light play (I hoped).
No, there is definitely a color difference. You can even notice some of the inter-mingling of darker beads, where I poured the "new in with the old". Maybe skin oils or time will darken the lower section, or I could even glaze it slightly darker, as they do with newly refinished furniture. I've done that before to beads, using a well of permanent black or brown ink.
You can see from the picture below, this is not very noticeable in every light. Here, it is not seen or noticed at all.
Thankfully, this is not a commission, but something for myself. Otherwise, I may have seriously considered the 'Glazing' idea. It does work well!
Other bead finishes are just as sensitive. The 'Dyed Opaque' line of Delicas, for sure, but now the Matt Metallics are added to my list! I'll double check the total count of beads 'before' I begin, from now on!
I finally feel the same as Textile weavers needing to keep that 'additional thought' of 'dye lot', in the back of their minds. Beading on a loom is completed in 2D, so "Bead Dye Lots" need to be considered more often.