All of sudden allergic to leather, WTH!

[RockyAussie]

I would say it is a vegetable tanned leather but like most things it may highly suitable for some uses and sometimes not others. Mimosa tanning agent is one of the most common and has a tendancy to go a light yellowy tan colour by itself and mixed with some oils this can affect the colour further and also these oils generally migrate to the surface of the leather and eventually dry out and need to be replaced. Most of the tooling type leather are not loaded with as much of these oils and fats and and will normally give no problems.The chemicals are probably helping in creating the rash but I would make sure that the knots of your thread are not giving you a problem. I notice they do not look well pushed in and I know the thread can create agitation as it does on myself. I have never used this type of leather onto a watch band lining before and I don't think I would now having seen this.

[tjsowhat]

1 hour ago, JD62 said:

Just curious because the place I use to work, we used a penetrant that glowed like that under uv but if you haven't been around any metal testing labs that won't be it.

I hope you get to the bottom of it soon.

Thanks for the heads up. I'm thinking of getting a physical done and asking for any special test available regarding this. 

[tjsowhat]

1 hour ago, RockyAussie said:

I would say it is a vegetable tanned leather but like most things it may highly suitable for some uses and sometimes not others. Mimosa tanning agent is one of the most common and has a tendancy to go a light yellowy tan colour by itself and mixed with some oils this can affect the colour further and also these oils generally migrate to the surface of the leather and eventually dry out and need to be replaced. Most of the tooling type leather are not loaded with as much of these oils and fats and and will normally give no problems.The chemicals are probably helping in creating the rash but I would make sure that the knots of your thread are not giving you a problem. I notice they do not look well pushed in and I know the thread can create agitation as it does on myself. I have never used this type of leather onto a watch band lining before and I don't think I would now having seen this.

Wow, thanks for all the info. The leather does have a darker yellowish glow under the UV light when it's cut, noticed this too. I tested rubbing my finger on both sides, no glow so far. Seems that sweat triggers the reaction. The rash on wrist was even, strap is 22mm width. The bracelet is also 22mm with same thread pattern. No rash on my right wrist, but the glow is definitely there as well. I'll read into that mimosa tree powder.