Paint Technology and Tests

by Henry A. Gardner

Corroded White Lead	Sublimed White Lead
Condition of Two White Leads on Two Grades of Wood

Photomicrographic Apparatus and Method of Use

CONDENSED REPORT OF INSPECTION OF “1906” TEST FENCE

Fargo, N. D., Nov. 19-23, 1909
No gloss shown by any of the paints. Formulas in white on white pine only included here, on east side of fence

Test No.	FORMULAS																														REPORT OF CONDITION
	Pigment																		Vehicle
	Cor- roded White Lead		Sub- limed White Lead		Zinc Oxide		Cal- cium Car- bonate		Silica and Sili- cates		Barium Sul- phate		Magne- sium Sili- cate		Clay and Silica		Bary- tes and Sili- cate		Lin- seed Oil		Turp. and Drier		Japan Drier		Water		Ben- zine Drier		Vola- tile Oil		Chalking	checking	hiding power	color	condition for repainting
	%		%		%		%		%		%		%		%		%		%		%		%		%		%		%
1	100		—		—		—		—		—		—		—		—		—		—		—		—		—		—		Very bad	Extremely deep	Good	Good	Only fair
2	—		100		—		—		—		—		—		—		—		—		—		—		—		—		—		Bad	Very slight	Good	Light yellowish tint	Fair
3	50		—		50		—		—		—		—		—		—		90		10		—		—		—		—		Medium	Fine matt—deep in places	Good	Fair	Fair to good
4	—		60		40		—		—		—		—		—		—		90		—		10		—		—		—		Medium	Surface checking, very slight	Good	Good	Fair
5	28	.7	—		71	.3	—		—		—		—		—		—		93		7		—		—		—		—		Slight	Quite deep	Medium	Good	Poor. Coating wrin- kled and hard
6	40	.2	—		50	.3	4	.1	5	.4	—		—		—		—		90	.7	9	.3	—		—		—		—		Medium	Slight surface checking	Good	Good	Good
7	21	.9	21	.9	45	.8	10	.4	—		—		—		—		—		89	.6	9	.7	—		0	.7	—		—		Medium	Surface checking with slight cracking	Fair	Good	Slight shelling from wood
8	44	.1	—		46	.0	4	.6	—		—		5	.3	—		—		86	.0	12	.6	—		1	.4	—		—		Medium	Very slight	Good	Good	Good
9	In gray only No report.
10	13	.9	—		34	.9	26	.8	—		—		—		—		24	.4	72	.2	—		—		24	.0	3	.8	—		Slight	Very bad	Bad condition throughout.
11	55	.0	—		15	.2	—		—		—		—		—		29	.8	Test not finished
12	—		5	.1	25	.0	—		—		—		—		—		69	.9	—		—		—		—		—		—		Medium	Medium	Deficient	Good	Shelling from wood
13	—		—		31	.3	45	.4	—		22	.8	—		0	.5	—		57	.2	—		—		16	.1	26	.7	—		Worst looking surface in North Dakota tests.
14	34	.8	5	.4	59	.2	—		—		—		—		—		—		86	.0	13	.7	—		0	.3	—		—		Medium	Slight surface checking and peeling	Fair	Good	Good
15	—		—		64		—		—		36		—		—		—		98		—		—		—		—		2		Slight	Lateral cracking quite deep	Good	Good	Hard film