Blue marks?

[baglover]

Some blue marks appeared on the stitches during the hydrator step. Not all the stitches are like this. They disappear when the bag dries. What caused this and what can I do about it?


Also, there are uneven colour due to sun exposure. If I repeat the hydrator-fatliquor cycle, can the colour be more even? See the top portion is lighter than the bottom beige portion in the photo.

[Roger Koh]

>>> Some blue marks appeared on the stitches during the hydrator step. Not all the stitches are like this. They disappear when the bag dries. What caused this and what can I do about it?

When leather is tanned with Chrome, the leather crust appears as “bluish-grey”, which is probably the reason. Just like your skin color will show through when your wet light colored clothes come in contact with your skin. And when the light color clothing becomes dry the color of your skin is no more shown through.


>>> Also, there are uneven colour due to sun exposure. If I repeat the hydrator-fatliquor cycle, can the colour be more even? See the top portion is lighter than the bottom beige portion in the photo.

If the leather crust is dyed with “aniline” dyestuff and if there is excess dyestuff still remains in the leather structure, then Hydrator-3.3 will help to redistribute the suspended dyestuff to the surface. For example, when you put hot water over some fresh tea leaves, the color of the tea leaves appears. But if the tea leaves are repeated with hot water again, less of the color will appear.


Roger Koh
Leather, Skin, Hair, Eye & Acne Care System Formulator
Consultant / Practitioner / Instructor / Coach
web: www.leatherdoctor.com
forum: www.leathercleaningrestorationforum.com
email: [email protected]

[baglover]

Thanks Roger! Very illustrative reply.

[baglover]

>>> Some blue marks appeared on the stitches during the hydrator step. Not all the stitches are like this. They disappear when the bag dries. What caused this and what can I do about it?

When leather is tanned with Chrome, the leather crust appears as “bluish-grey”, which is probably the reason. Just like your skin color will show through when your wet light colored clothes come in contact with your skin. And when the light color clothing becomes dry the color of your skin is no more shown through.


>>> Also, there are uneven colour due to sun exposure. If I repeat the hydrator-fatliquor cycle, can the colour be more even? See the top portion is lighter than the bottom beige portion in the photo.

If the leather crust is dyed with “aniline” dyestuff and if there is excess dyestuff still remains in the leather structure, then Hydrator-3.3 will help to redistribute the suspended dyestuff to the surface. For example, when you put hot water over some fresh tea leaves, the color of the tea leaves appears. But if the tea leaves are repeated with hot water again, less of the color will appear.


Roger Koh
Leather, Skin, Hair, Eye & Acne Care System Formulator
Consultant / Practitioner / Instructor / Coach
web: www.leatherdoctor.com
forum: www.leathercleaningrestorationforum.com
email: [email protected]

Hi Roger, I've used Hydrator to keep the bag wet for 2 cycles (without fatliquor), but the colour still does not diffuse. Should I use fatliquor like a normal cycle?

[Roger Koh]

Do you have pictures of when the bag was wet?

>>> but the colour still does not diffuse.

Did not diffuse when wet, but disappear when it is dry?

[baglover]

Do you have pictures of when the bag was wet?

>>> but the colour still does not diffuse.

Did not diffuse when wet, but disappear when it is dry?

Please see the photos when wet. The area around the hardware is harder. This uneven colour did not diffuse out when wet, and remains when dry.

[Roger Koh]

>>> Please see the photos when wet

Please explain the steps and products you are processing up to this stage?