The Edison Diamond Disc was composed core called the powder blank, and a
varnish which set into the hard recording surface. The varnish was made of
phenol, paraphenylindiamione, denatured alcohol, pentachlorophenol,
hexamethylene tetramine and sandarac-an organic resin.
Use EDIS 7415.612
As the expert phenol resins, Jonas Aylsworth would have supervised this
operation. The blank contained wood flour, lamp black, phenol resin,
denatured alcohol and hexamethylene tetramine. vacuum pump
was placed nearby. Phenol resins were used in
both these parts. this time was not member the staff this building; had
his own laboratory his house Orange.
Use EDIS 7374.
PHENOL CONDENSER (on
table)
Figure 34.
PULLEYS (in place) Figure and physical
evidence.Table Phenol Production.
Object and Location Evidence Recommendation
Table 6
LAB TABLES, (in place) Figure and physical
evidence.
Use EDIS 350 and EDIS
collection. This created the
thick resin, called condensite, which when cooled could used records.
188
. was under contract Edison and
he would have supervised this work Building 2. The condensing distilling machine was located this table. 716-17; also 1914, Phonograph, Record, Manufacture.
Use EDIS 7411. The various elements the mixture were
pumped and then condensed under pressure and high heat.
VACUUM PUMP (on table,
connected drive shaft)
Attached phenol condenser. It
was pressure container which vacuum could created.
DRIVE SHAFT (in place) Figure and physical
evidence.
612 Leah Burt, "Chemical Technology the Edison Recording Industry," Journal ofthe Audio
Engineering Society (November 1977), pp.
Electric MOTOR (in place) Figure and physical
evidence. Reproduce. Phenol was pioneer form plastic and was the
main ingredient the condensite used make the recording surface Edison
Diamond Discs. The container was sheathed steam jacket heat the
mixture phenol and formaldehyde and steam pipes were attached. Reproduce. the
bottom the container was valve draw off the hot liquid and manhole cover
attached large bolts was the top
