Showing posts with label Finish. Show all posts
Showing posts with label Finish. Show all posts

Thursday, July 21, 2022

Liquid Sequence

 This post is intended for anybody not sure of the sequence of applying dyes, paint, antiques, sealers, and conditioners.


You can download and print this chart at the "Downloads" tab at the top of this blog.



Monday, January 4, 2021

Cracking Leather

 Stop Leather from Cracking

"My leather cracks when I fold it after dyeing.  Help!!"

This comes up often as a problem - here is my take on the issue:

First Question:   Are you using the Eco-Flo water based stain from the square bottle?
If you are, please read this blog post (it covers the two important secrets in using this stain - shake and long application):

Next Issue:   The dye changed to very top layer of the leather.   This will take some explanation.

If you aggressively fold leather as it comes from the tannery, the outer layer will probably stretch enough so that it does not crack.

Now think of the leather fibers as the same as the hair of a paintbrush.   Easy to bend over, until you use it in paint and you do not wash it.   They dry very stiff and hard.

Exactly the same happens to the leather fibers that you dyed.   People think it is the dye that dries out the leather, but you start off with dry leather.  It is now the leather fibers that stick to each other.

To solve this problem, there are a few things to consider:
  • You can bend the leather while it is damp and the leather can stretch more.   This can be when it is still damp from the dye, or you could get the whole piece damp again.
  • You can treat the leather with a conditioner such as olive oil, neatsfoot oil or any of the waxy greasy conditioners out there.   After it has penetrated the leather, manipulate the leather to give the fibers a chance to work them selves loose and become lubricated.
  • Not all leathers are tanned with the same recipe - some may easily accept an aggressive fold and some may crack just because of the way it was tanned.
  • The thicker the leather, the further you expect the outer layer to stretch, which could also be a factor.
Keep these points in mind and test with cut-off pieces what works best for you.

There is a lot of opinions out there about oil and dye / before and after.  You have to be VERY careful with this advice!!!       Please read this:

I will add to this post as I think of more things.
Have Fun!!!


Thursday, November 5, 2020

Dubbin

The Ultimate Leather Finish / Dressing Any Leathercrafter can Use! 

I have successfully made my own Dubbin: 
I rendered sheep fat for the tallow (beautiful white stuff - also good for cooking and preparing cast iron cookware), and then I added Beeswax and cod liver oil (or Neatsfoot oil), lanolin and glycerin. 
The result is all I expected and I do not feel anxious any more about having to import my Dubbin from South Africa!

Etherington & Roberts says it is made of tallow and cod oil. Thelma Newman, in her book "Leather as Art and Craft" describes DUBBIN as a mixture of Tallow and Cod liver Oil.

I suspect Dr Jackson's Hide Rejuvenator is very close to Dubbin.  Also Colorado Leather Balm, made from beef tallow.

Why I Like DUBBIN so Much!
  1. DUBBIN feeds and protects the leather from the inside and replaces all the oils taken out of the leather during the tanning process.
  2. DUBBIN brings out a deep glowing color in leather. In un-dyed leather it will cause the leather to turn a golden honey color when exposed to light.
  3. DUBBIN is very good for your hands - especially in winter. I always apply it by hand - it allows me to regulate exactly how much I put on.
  4. DUBBIN never accentuates stains on leather - it rather tends to clean up any water or light stains.
  5. DUBBIN Can be used over any dye or finish, such as spirit dyes and water based dyes as well as water based inks.
  6. DUBBIN allows leather to become supple without loosing its shape - it helps the leather to stay "alive" and always as beautiful as new.
To Make Your Own 

Here is my suggested quantities (I vary them every time I make a batch - just like grandma used to bake with a handful of this and a pinch of that.....):
  • 1 kilogram lard [2 lb] - I prefer sheep lard. It has to be rendered - cut it up and boil it in water until the lard separates out clear from the water and gunk. Pour it off so that you can let it cool off and solidify.
  • Less than 100 grams of beeswax [1oz or less]
  • 1/2 liter of Cod Liver Oil [16 fl oz].
    If the thought puts you off, replace it with Neatsfoot oil or olive oil, in fact, any plant or animal oil, but definitely not a mineral oil (that will attack your leather).
    I have doused a piece of leather in Cod Liver oil - it smelled fishy for four hours, and then the oil and leather started to talk to each other and all that was left, was a very traditional leather smell.
     Cod Liver oil used to be a very traditional oil used in working with leather and some ascribe the very romantic smell of the previous century car interiors and saddles and leather goods, to Cod Liver oil.
  • 60 ml of Lanolin [2 fl oz]. I have found pure lanolin sold in pharmacies for use by breastfeeding mothers.
  • 60 ml of Glycerin [2 fl oz].
Simply melt them together gently - the result should be creamy and easy to apply to leather. 

Answers to DUBBIN critics: 

It is sometimes said that DUBBIN rots stitching on leather articles. 
When applying DUBBIN you must simply make sure that you do not leave chunks of Dubbin in folds or seams of the leather - this will collect dust, trapped by the thick DUBBIN and the dust will then rot the stitching. 
I always polish a project that I have just applied DUBBIN to, with a soft brush - there seems to be some beeswax in DUBBIN that will cause the leather to have a natural shine when treated like this. 

I posed the following question to the Leather Chemists of America:
I make my own Dubbin as a leather dressing - mainly for veg tan. I am curious as to the ingredients I use and how meaningful they are (are they all necessary?) Beeswax Sheep Tallow Cod Liver Oil Glyserin Lanolin
I see on the ALCA dictionary that there is also mention of aluminum stearate in dubbin - what is its purpose and where can the-man-on-the-street buy this?
This was the answer I got back:
Each of the materials in your dubbin has a unique character and therefore imparts a special trait to the leather.
The wax protects the surface and adds that unique feel to the treated leather.
The tallow penetrates a little better, but also contributes to that waxy nature, but also has a lower melting point, so it changes more effectively when warmed slightly than the wax which remains solid to a bit warmer condition.
The fish oil penetrates deep and softens as well as providing anti-oxidant properties and even some tanning when heated.
The glycerin is a good humectant and keeps the leather from over drying by pulling moisture from the air.
Lanolin is also unique, though some folks are sensitive to lanolin and should always be advised that it is in the leather. This sheep byproduct has long been taunted as a great soften and water repellent for leather.

Clearly the amount of each of these materials in the dubbin can be a major issue, but that is something that I am sure you have seen with time and experience as you adjust your formula.

Aluminum stearate is just soap, though most would probably consider it more a grease than a soap. It combines a wax and humectant roll, but just as most leather experts warn against the use of saddle soap, I think you will quickly see that this soap really has little to offer your mix.
The biggest issue with soaps and leather is that soaps are made under highly alkaline conditions, and unless that basicity (alkaline pH) is neutralized it can carry terrible consequences to the acid leather.

 Published Aug 2016
Updated Jul 2017

Monday, November 2, 2020

First test of WaterBased Neatlac

 

 

 Jan 2019: I got hold of the new Neatlac (waterbased) and so I have started to test to see if it lives up to the quality of its obnoxious, but good quality highly used, predecessor.

So [A] I used it on Eco-Flo Water Stain. It made the color pop beautifully, but arrow [1] and arrow [2] shows that you should not let it pool anywhere (I put it on liberally so that it would pool so that I could see the effect). 

In [B] I used it as a resist under Eco-Flo Hi-liter - worked very well as a resist (in all of these tests I only used 1 single layer of Neatlac).

Piece [C] was first stained with Eco-Flo Hi-liter, and then the Neatlac was used as a sealer over it (also used as sealer on piece [B] ).

Arrow [4] shows a spot where the brush did pick up the stain - so I am going to stay with LeatherSheen from a spraycan to seal in any antique stain. My friend Jim Linnell showed me how to put a sealer like this on with a sponge: you simply work it until it is even - the sponge will pick up some of the antiquing, but you just keep working it until it shows even.

The difference between the light and dark indicated by arrow [3] is merely a border between more and less oxidation - the Neatlac had no effect there.   In the second photo, the arrow shows a border between Neatlac and no Neatlac - [a] has Neatlac as a resist to Fiebings Antique Paste, and [b] has no resist.

So it looks like Pro Resist by Fiebings is a better resist for its own paste.

Piece [c] simply had Neatlac as a topcoat over the natural leather - no color - nice and shiny. I think with practice and more experiments this product might just be as good as it was when it was still a bit poisonous many years ago.

First published Jan 2019