>>> Please send instructions re major repairs of rotted areas and splits with the 3D Bond and suede shaver as once I have used all the fatliquor I have left and it dries out I will have to start repairs.
Tips:
1- Stitching repairs may begin during the Fatliquor-5.0 drying process. It is easier to stitch when the leather is soft and strong. It is also a time to test out the strength of the fatliquoring. The hide should hold up the stitch without ripping or tearing, otherwise the hide might not be supple enough.
2- When stitching is done the option to bond them may be by Bond-3D > Patch-4S. A finer technique is by shaving suede fiber from thicker neck areas as donor and work with Bond-3D. In both methods the stitch is covered up with Bond-3D and donor- suede fiber or Patch-4S.
3- Caution when using Razor-60. Either wear gloves or have half of the blade heavily tap-up. Hold it at right angle with the hide and moves side ways in a scraping action.
Further readings:
Product Description
Leather Doctor® Bond-3D is for leather structure bonding repairs, such as abrasion, cat-scratch, and filling repairs with Stucco-90, Micro-54, Anline-76 and Aniline-21. This waterbased medium soft polyurethane leather bond will not lift the leather finishes unlike other dry solvent-based glue. Works in conjunction with leather Patch-4S as sub patch and suede fibers as fillers. Excess clean up when dry will require the help of Bond-7A to smooth without the need of sanding.
Bond-5C a medium soft acrylic resin when mixed with equal portion with Bond-3D provides a tackier mixed for easier control application with added strength for a stronger bond.
Tips:
1 Colors and dyes can be added for aesthetic repairs.
2 Test for darkening effect when dry, prior to repair.
3 Use leather Patch-4S as sub-patch to bond.
4 Use suede fibers for filling repairs for aniline leathers.
5 Use Stucco-90 for filling repairs for pigmented leathers.
6 Use leather Bond-7A to smoothen abrasion repairs without the need to sanding.
Types of Repairs using Bond-3D:
A. Cut Through Repairs.
B. New, Fresh and Clean Accident Abrasion Repairs.
C. Prolonged Contaminated Abrasion & Holes Repairs.
D. Cat-Scratch Repairs.
A. Cut Through Repairs.
A cut through repairs utilize Patch-4S as a sub-patch and this is bonded suede side to suede side.
1 Where tension causes the leather to open, it is stretch to an overlapping position with some physical help.
2 Preferably the Patch-4S is bonded to one side first prior to bonding the other side to reduce the overlapping effort.
3 This is a slow drying product thus a blower may come helpful to speed up the drying process.
4 The bonding process will require the bond to cure for tension strength, thus holding the rip in position until fully cured is necessary.
5 Vertical filling gap may be done with added matching coloring for aesthetic.
B. Fresh and Clean Accident Abrasion Repairs:
Abrasion in most cases will roughen up the leather structure with missing finishes.
1 Any soiling is removed with brushing prior to applying Bond-3D to smooth the damages.
2 Repeat application is necessary to build the smooth skin back gradually.
3 Bond-7A helps to smooth it without the need of sanding.
3 Color matching is done accordingly to the finish types.
C. Prolonged Contaminated Abrasion & Holes Repairs:
Constant abrasion with repeat compression may loosen and weaken the leather structure compound with loss of fibers or missing parts. Repairs to such neglected damages may take on a holistic approach to restore systematically the damages. Degreasing with Degreaser-2.2 is recommended to remove surface and penetrated oil and grease soiling in conjunction with Rinse-3.0 to remove foreign contamination. Leather rejuvenating is also recommended to restore the leather softness and strength with Hydrator-3.3 follows with Fatliquor-5.0. Tightening the leather structure may be necessary to restore over-stretched leather with Impregnator-26. Bonding repair with Bond-3D commence thereafter with smoothening, filling with donor suede fiber especially for aniline leathers or optional Stucco-90 for pigmented leathers. Repair prepares the surface for color refinishing that follows with Adhesor-73, matching coloring and matching topcoat that ends with a rub-resistant protection.
Roger Koh
Leather Care System Formulator
Consultant / Practitioner / Instructor / Coaching
web: www.leatherdoctor.com
forum: www.leathercleaningrestorationforum.com
email: [email protected]
