February 10/14

Rick, Miles, Paul, J Hiltz and J macLean

We continued to work on the vase project.
Leo has developed a sophisticated jig mechanism to use a die grinder to carve out the designs on the vases while they are mounted on the lathe.

We are practicing gold leafing
Using Fish glue and whiting to place multiple coats on a wood base, sanding every layer to build up a Flat and smooth surface for gold leaf application practice.

The fish glue and whiting  is uses because when the surface is wetted, the glue melts a bit and the gold leaf grabs the surface nicely.

Whiting is limestone (CaCo3)
Could use medusa cement as well

Target makes a water based acrylic lacquer
Bole is clay and water
Mix Bole with glue (Rabbit glue)
Gesso is whiting and concrete bond
Use 8-10 coats
Then add the bole in several coats
Sand to 2000
Apply gold leaf

Use a plastic cap with a foam plug..wetted..to cover your spray gun tip when spraying the acrylic
This prevents the acrylic from drying on the nozzle

Glueing tips

Tips:

Glueing up a large panel:

Lay 2 strips of flat, planed wood on the surface on which you are working
Level these using an accurate level
Place the finish planed strips which you are glueing on the boards
Glue up 3 to 5 pieces at a time
Place 5 or 6 more strips  on back of these (NO GLUE)
Clamp this assembly

Continue adding strips, glueing several and using several more  UNGLUED strips to do the clamp-up

This results in aa level surface with no  "wind ",  requiring less planing/sanding

Assembling a table, desk etc

Using fish or hide glue makes glue-up easier as it acts as a lubricant and is less likely to grab : you can adjust the members more easily and steaming the joint will let you correct a mistake in alignment.

Glue up one side /section of a large piece at a time
Dry assemble  the rest for clamping, keeping everything straight and aligned properly
Then glue up another section

Guilders use rabbit glue for gold leafing

Instant glue(Cyanoacrylates):  you can leave the cap off or set it loosely on the bottle: the glue doesn't harden in the bottle.

Definitions:

Bole- a smooth clay/water mixture: applied i n layers over a surface in preparation for gold leafing. Use this past mixture and mix it with Rabbit skin glue to get the best surface for gold leafing.

Whiting-Limestone (calcium carbonate) : mix with fish or hide glue and apply several layers to surface to create a hard sooth surface; sand between each application

Medussa cement can be used in stead of limestone

Gesso-a hard compound of plaster of Paris or whiting in glue(Rabbit)  used in sculpture or as a base for gilding or painting on wood.

Guilders brush-picks up gold leaf by static electricity

Target acrylic--a water based acrylic lacquer: excellent to spray on.
(Cover the nozzle of the spray gun with a plastic cap foam filled and dampened to prevent the nozzle from hardening over.)

Ochre-a coloured clay to make Bole

Agate-stone used to smooth on the gold leaf

Fibonacci numbers or Fibonacci sequence are the numbers in the following integer sequence:

or (often, in modern usage):

.

Link

By definition, the first two numbers in the Fibonacci sequence are either 1 and 1, or 0 and 1, depending on the chosen starting point of the sequence, and each subsequent number is the sum of the previous two.

Golden Ratio

In mathematics, two quantities are in the golden ratio if their ratio is the same as the ratio of their sum to the larger of the two quantities. Expressed algebraically, for quantities a and b with a > b > 0,

where the Greek letter phi ( or ) represents the golden ratio. Its value is: