Results of 6/2005 varnish and ground test on spruce and maple wood samples...
Spruce wood test results:
Ground Formula Designation (see key below):
Hewlett-Packer test results from pendulum tap test on 1/7/2006 (loudness ratings)\
{higher number = louder} description: grain width:
B
C
A H I
D E G
J GD C/D
7.0
6.7
M.
4.9
4.7x2
N.
5.3 4.6
4.9
German Oil- Varnished Spruce Samples W.
  1. 0-
-5.5Note: no space for the text!
M. 4.8
N.
2.7 3.7 2.4
Propolis Oil- Varnished Spruce Samples
4.6
W.
4.7
5.7
4.7
N. 1.9
1.1
(Note: the 'x2' notation above and below means that the coating was applied to both sides of wood sample, instead of only on one side.)
Maple wood test results:
Ground Formula Designation (see key below):
Hewlett-Packer test results from pendulum tap test on 1/7/2006 (loudness ratings)\
{higher number = louder} description: grain width:
B
C
A H I
D E G
J GD C/D
3.4
Unvarnished Maple Wood Samples
M.
1.5
2.1
N.
2.4
2.4
3.1
W.
German Oil- Varnished Maple Samples
M. 1.9 1.1 1.7
N.
Propolis Oil- Varnished Maple Samples
N.
Key for abbreviations used in tables:
  1. Wide wood grain
  2. Medium wood grain
  3. Narrow (or fine) wood grain

Ground Designations: (unless noted, coatings are only on one side)

A: Ultra Violet light exposure on two sides + shellac (+ oil varnish)
B: Oil Varnish
C: Ultra Violet light exposure on two sides + glue/strad ground {formula "BA"} (+oil varnish)

D: Ultra Violet light exposure on two sides + glue sizing {formula "G-S"} (+ oil varnish)
E: Ultra violet light exposure on two sides + strad. prep. ground {formula "AA"}{3 coats} + shellac (+oil varnish)
F: Ultra Violet light exposure on two sides (+ oil varnish)

G: My three-part ground formula {formula "CA"} (one coat) [equal parts: strad. prep. / hide glue / propolis... one coat]
H:
I:

J:
K:
GD: My three-part ground formula {formula "DA"} (one coat) with 4 carrot-weight diamond powder (8,000 screen) added
C/D: above 'C' ground on face side with above 'D' ground on back side.

Note: no space for the text!
Another view of the same test results:
(this time laid out on a horizontal scale, the Letter refers to the 'ground' and the number to the pendulum results)
{a '2' designation means that the 'ground' was applied to both sides instead of only one.}
1
Category: 4
6 8
F2
A C
F
Spruce / unvarnished D C2 E2
GD
F A
B
E
Spruce / Propolis Oil Varnish
F A
D
1
2 3 4 5
6
Category:
{ '/G' means German oil varnish; '/P' means propolis oil varnish.}:
Varnished
Spruce
Wide Grained
G
GD
Unvarnished
E/P
Varnished
Spruce
Medium Grained
Unvarnished F
C2
C
F2 E
F/P
A/P
A/G B/G B/P
Varnished
Spruce
Narrow Grained
F2
A
D D2
Unvarnished
D2
0
1 3
2
4
Category:
Maple / unvarnished E2
G C G C2
D
C
F A
D B E
Maple / Propolis Oil Varnish
Category:
{ '/G' means German oil varnish; '/P' means propolis oil varnish.}:
C/G B/G
Varnished E/G
Maple
Wide Grained
G
Unvarnished
A/G
Varnished
D/G
Maple
Medium Grained
E2
C
Unvarnished C2
D E
G
Varnished
Maple
Narrow Grained
Unvarnished
A