Green or blue stains may indicate sunlight combined with a catalyst.
Bright yellow spots on carpet.
Those with much peroxide are bright yellow and exhibit an orange halo which moves outward as the bleaching action.
I am a basic user of photoshop.
The majority of the time this is the cause of the brown or yellow spots or rings that develop on your carpet after you clean.
Tackle wool carpet or wool blend with 1 tbs.
Put on your gloves and work the solution in with your fingers.
Or if it really is yellow 2 apply an acid side product like fab set at 4 to 6 ounces per gallon or citric acid powder at 10 to 12 ounces per.
Stomach acid is 10 stomach acid so vomit must be cleaned up promptly and neutralized with a mild alkali such as a detergent solution and rinsed or there will be permanent colored spots.
Yellow spots occurred on the surface of sliced ham which was made without sodium nitrite and stored at 4 c for 2 to 3 weeks.
I am guessing that this is.
Yellow stains indicate reactions caused by strong oxi dizers or bleaches.
However there may be some other variables at play too.
Place it in a spray bottle or apply it directly to the stain.
Recently i have been restoring old family photos that are forty to 100 years old.
Do not soak the carpet.
Many have yellow discoloration that appears mainly along the right or left edges of the photos.
Abundunt lactococci and lactobacilli were predominantly isolated from those spots.
In general red spots on tan or beige carpet may suggest strong acids.
Then bursh it into the carpet.
You simply want to get enough on so that it is wet but not soaked.
This is nothing to worry about.
Fresh sliced ham without the preservative was spotted with these 127 coccus and 74 bacillus strains and then incubated at 4 c or 20 c.
1 spray on a anti wicking agent like encapuguard green.
Chlorine usually causes yellow spots but will turn some red dyes to green.