D115 going purple ?

[thedoc46]

Hi, my D115 has gone from a nice sky blue to a dull purple in the last few months?? Gallon container is actually about 2/3rds of the way thru. So due for a replacement soon.. It's about 2yrs old. However the weird thing is, my 4:1 bottle mix which hasn't seen as much action is still at the same color as it was new, which is the SAME D115 thats gone purple from 2yrs ago. Its just that it doesn't get as used as much and therefore isn't rotated with replacement product as the 8:1 bottle.

So to confirm wtf was going on, i poured the same D115 solution out of its original container into a beaker, and its definitely purple, instead of sky blue... So basically its coming out purple out the original container.

Why would that be.. also i've noticed its not as slippery and the microfiber doesn't seem to glide as much. (could be in the head tho)

Images







Un-diluted, straight out of its D115 black bottle... Could the dye from the Meguiars original black plastic bottle be causing this? I have no other explanation. If not, why has it stayed a nice sky blue in the 4:1 mix that was done perhaps 8 months ago ?

[Michael Stoops]

Re: D115 going purple ?

It's not uncommon for colors to drift a bit over time, depending on colorants used, but it's almost never an indicator of anything gone bad with the product. It's actually pretty common to see this exact color change with D115 (we have the this situation in our Training Garage right now, and I do at home, too) but we can assure you that the product is still perfectly sound and totally safe to use. We've seen D155 Last Touch swing from a pinkish to slightly orange shade at times, and Ultimate Wash & Wax go from very bright yellow to a darker shade of yellow. Again, not a problem with the products themselves, but rather a light instability issue with some of the colorants used. That the color of the diluted D115 you have has not changed is likely down to the slight pH adjustment that happens when you do dilute it. And, yes, the colorants can sometimes be THAT sensitive to pH changes.

When you should begin to worry about whether a product has actually gone bad or not is when it starts to smell really bad, or in the case of lotion like products (think compounds, polishes, liquid waxes) it separates into a watery component and a thick component AND it won't mix together again no matter how much you shake the bottle. A little separation over time is normal and a good shake should mix it all back together again - it's only when shaking won't mix a product back to its original state that you've got a problem.

[thedoc46]

Re: D115 going purple ?

It's not uncommon for colors to drift a bit over time, depending on colorants used, but it's almost never an indicator of anything gone bad with the product. It's actually pretty common to see this exact color change with D115 (we have the this situation in our Training Garage right now, and I do at home, too) but we can assure you that the product is still perfectly sound and totally safe to use. We've seen D155 Last Touch swing from a pinkish to slightly orange shade at times, and Ultimate Wash & Wax go from very bright yellow to a darker shade of yellow. Again, not a problem with the products themselves, but rather a light instability issue with some of the colorants used. That the color of the diluted D115 you have has not changed is likely down to the slight pH adjustment that happens when you do dilute it. And, yes, the colorants can sometimes be THAT sensitive to pH changes.

When you should begin to worry about whether a product has actually gone bad or not is when it starts to smell really bad, or in the case of lotion like products (think compounds, polishes, liquid waxes) it separates into a watery component and a thick component AND it won't mix together again no matter how much you shake the bottle. A little separation over time is normal and a good shake should mix it all back together again - it's only when shaking won't mix a product back to its original state that you've got a problem.

Thanks Michael. Yes the product still smells the same, which is a nice thing, as its a nice smell. Its just the color that's chnged. And when i said it may not of glided as well on my microfiber (being that it could just be in my head) could also of been that i was also trying a new microfiber cleaning detergent, and the MF's had just come out of the wash. I tried it some more after my initial post, and it seems to be gliding as good, now that some of the static is out of the microfiber. Color doesn't bother me, as long as its performing as it should, then its all good.