Photography reference
Edwal Laboratiries Product booklet
Product booklet for Edwal Laboratiries. 5 pages in English. Read the original PDF, download or print a copy without registration.
5 pagesEnglish1.0 MB PDF
Loading your manual…Open PDF directly
Document details
- Brand
- Edwal
- Model / document
- Edwal Laboratiries
- Document type
- Product booklet
- Language
- English
- Pages
- 5
- File size
- 1.0 MB
- Category
- Photography reference
- Document date
- Not specified in catalog
Search available document text
Find a term, then jump to its page in the original PDF. Image-only pages may not be searchable; check the PDF for exact wording and diagrams.
Page 2 · Read text
www.orphancameras.com
FINE
CHEMICATS
FOn
www.orphancameras.com
FINE
PICTURES
EDWAL Products Produce
LABORATORIESINC.
T H E 732 FEDERALST.,CHICAGO, ILL. tJ**/View original page 2Page 3 · Read text
www.orphancameras.com
HOW TO EXPOSEFOB FINESTGRAIN
By Edmund W. Lowe, Ph. D.
Whct Is Grcin? sofe with Edwol-l2, ond the full normcrl for Edwol- 20. Where shodows qre not dark, less exposure
When on exposed iilm is developed, the silver cqn be used, qnd printcble negotives hove been
bromide porticles in the emulsion qre converted mqde in Edwcl-l2 with cs little cIs I/16 normcrl
into groins of metcllic silver. If the silver grcrins exposure. On the other hcrnd, where shqdows qre
stcyed where they were Iirst formed, there would very dark compored to the rest of the scene (e.9.,
be no "fine-groin" problem, for the originol silver on neqr-by scenes in very bright sunlight) more
bromide porticles qre exceedingly fine qnd very exposure should be used to get shadow detcril, cnd
evenly distributed in the gelotin emulsion. How- then developing time should be cut I\Vo lo 20Vo
ever, the silver groins do not "stqy put" but tend to to prevent too dense hiqhliqhts.
cgglomercte or gother into clumps, cnd this pro-
duces cn uneven silver deposit in the negotive. Recommended Speed Rctings
Since the silver clumps prevent light from possing We qre printing herewith the Weston ratings through, while the holes between them ollow cr
greot deol of liqht to poss, cn eniorgement mqde which we find to give best results with a number
of Americon 35 mm films. These crre for use with from such c negotivb will hcve cn uneven, mottled
ctppectrqnce, qnd is scid to be "groiny." The negq- Weston and similcr photo-electric exposure meters.
tive itself is scid to be "coqrse-grained," clthough
q better term would be "uneven-groined," since Edwar-r, E*ifi131
the grcins themselves qre not coqrse, but qre SfiTtr Y 1 r L 'vo"aoY f s A s s fi$iltvo"ao unevenly gothered into clumps. Aofo Ultrcr Speed I92 I20 96 64
Whct Prevents Grcin? Aqfo^ --: Sror.*"-::;'--- I| r20 B0 64 40 uu -HonI -A,L I
)I clumpingIt is obviousof the silverthct cnythingporticles whichwill preventwill prevent"grcin- Super-XAgfcr Superpon 64 40 J Z 2A
iness." Much hcrs been written qbout this, cnd Du Pont Superior ) mony strcnge remedies hcrve been devised, bui
reseqrch crnd experience both show thcrt the three Pqnotomic 40 z4 on t2
fundomeniqls qre: l. Use c good line grcin devel- E. K. S. S. Pon
opet. 2. Do not overexpose. 3. Do not overdevelop. Finopon
These qre 90Vo of successful fine grqin technique. Pcrpcn ,tz 20 r o I O
The remqininq I\Vo mqy be credited to emulsion
hordening, temperoture control, woshing time, dry- For conversion from Weston Weston Scheinero
ing time, qnd other miscellqneous fcrctors. to Scheinerrctinss, a tqble of 133 33 equivolents is printed here. i;6 2s
When the qbove rotings ore l0O 28 Whct Developer to Use used on close-ups, the meter P9 27
There is no single developer yet devised which shouldbe pointed 36 Z? "t-li;;;;l-where 40 24 is suited to cny cnd every type of photogrcphic est port of the subject
work, For this reqson, three Edwol fine grcin devel- detoil is desired. Roll . films 31 'rZ
opers have been ploced on the mqrket. Any one shouid be rcted one step lower ti zl
ccn be used in general photogrcphy, but eqch one thcn the corresponding 35 mm 16 20
is especiolly designed to give the best possible emulsion becouse somewhot I? 19 tB results in one particulcr field. A complete list of sreaterdensityi" J*i;;J .; i?
the uses of ihe three-Edwal, 12, Edwcl 20, cnd lcrger negctives. 6 16
Minicol-is given on the opposite page. Doyliqht ri:tings qre for use in briqht sunlight
only. Before 9:00 A. M. or qfter 4:00 P. M., or on
How to Prevent Grain Through Control smoky, cloudy, or hczy dqys, the Mozdcr rotings
oI Exposure should be used. This is becouse the films qre pro-
portionotely more sensitive to blue cnd violet light
Too much exposure cquses development to pro- thon crre the exposure meters. Smoke, fog, ond
ceed too rapidly, with the result thqt much more hcze filter out much of the blue cnd violet from
clumping tckes ploce thon is necessqry. The ob- .nqturql doylight, so thct q lower speed roting is
vious remedy is to keep exposure down to o mini- necessqry.
mum. The best exposure lor line grcin work is the
shortest exposure thct produces sullicient shcdow The rotings given in the tcble cbove correspond
delcil. It is usuolly hord to obtain just this correct to about one-holf normal exposure for Edwcl-I2,
exposure, even with a good lighfmeter. For the ond full normcrl for Edwal-20 ond Minicol. This
finest possible grain, severql exposures of different does not meqn thct Edwcrl-12 gives twice qs dense
lengths should be mqde on eqch subject so thot the o negotive cs D-76 or crn M-Q developer. It does
finol picture cqn be mqde from the ihinnest negq- meqn, however, thot Edwcl-l2 clnd Edwcl-20 give
tive thot hqs shqdow detoil. best results with o low-density negctive so thqt
for cll prccticol purposes Edwcl-I2 doubles the
If it is impossible to get more thqn one shot, the effective speed roting of c 35 mm film. On very
shortest scle exposure should be used. The length lqrge negqtives where high density is desired for
of q "sqfe" exposure depends on how deep the contqct printing purposes, full normql exposure
shodows qre in the scene to be photogrcphed. For should be used with Edwcrl-]2 qnd twice normcrl
overqge scenes, one-holf the normol exposure is with Edwol-20.View original page 3Page 4 · Read text
www.orphancameras.com
EDWAL PHOTO CHEMICAL PRODUCTS
A negotive is useless if it does not moke o print thqt resembles the originol
subject. with this in mind, Edwol photo-products hqve been designed <:nd
compounded so os to produce perfection in the Jinol piciure.
Edwcrl Fine Grqin Developers not only yield fine grqin, but qlso good grodotion,
brillionce, tone seporotion, ond contrqst. Edwcl Print Developers cotch every detcril
ond grqdqtion in the negotive ond reproduce them in the print in iones thqt qre
pleqsing to the eye.
Edwal Fixers, Hordener, Film Dryer, Film Cleqner, Ferrotype pojish help you
get results without fuss or muss. Complete directions qre included with every pack-
OgE. EDWAL PRODUCTS ARE MADE BY SK]LLED CHEMiSTS. THEY GET RESULTS.
Edwql Fine Grqin Developers
Edwcl-I2-For speed work. Recommended for use with one-hclf
normol exposure (see tcble of Weston speeds cbove) and hos produced
printobl.e negctives with os little os l/16 normcl exposure. when used
with the new fqst films, it is excellent for news, sport, stage, ond simi-
lqr shots where poor light is encouniered.
Edwol-]2 will give onv degree of contrqst desired cnd is widely
used for color sepcrotion negotives qnd for- commerciql deeptonk
development.Edwol-12 negotives yieid enlorgements to fifteen di.om-
eters consistently qnd to twenty-five diameters with proper negotive
density. Avoiloble in prepored form qs:
Edwcl-]2 (Powder) Quqrt Ccn $ .70 Gallon $1.75
Super-I2 (Liquid) Pint Bottle $ .80 Qucrt $1.25
Edwcl-20-For Super-Iine Grqin With Norrncl Expcsure. This is the
qmqteur's deveioper pcr-excellence. Enlorgeilents to 60 diometers qnd
more, superb gradotions qnd tone rendition, brilliont negotives. Edwcl-
20 is intended for londsccpes, buildings, wcter scenes, etc. It is qlso
excellent for outdoor portrcits, softly liqhted indoor shots, ond indeed
for all ordinory photogrcphic work where greot speed is not required.
If you wqnt to stcrt with one developer cnd stick to it, use Edwal-20.
Price:F
Edwol-20 (Powder) Quort Con $ .70 Gollon $1.75
Super-20 (Liquid) Pint Boitle $ .80 Quort $I.25
. Minicol-For Texture. Minicol is the deveioper for strongly liqhted
closeups such crs men's portroits, still-life, cdvertising shots of mq-
chinery, fcbrics, etc. It is qiso recommended for photography of flowers,
rocks, insects, biologicol specimens, ond indeed cny subject where
surfqce texture must be shown. Minicol is unique qmong fine grcin
developers in thot overexposure or smqll vcricrtions of developing
times do not cquse much increqse in grcin. Availcble in prepored
form only.
Minicol Powder, Qucrt. .$ .gS
Minicol Liquid, QucrtView original page 4Page 5 · Read text
www.orphancameras.com
Edwcl Pcper Developers
The two pqper developers Edwcl-IO2 ond EdwoI-I06 contoin no metol, qmidol, or other chemiccl capoble
of cousing skin-poisoning or rosh. They contoin Monqzol, the new powerful developing ogent that
produces rich deep blocks ond truthful grcdotions in ihe print. t
Edwcl'I02-For Pure Blcck Tones on All Pcpers. Edwcl-102 produces true blocks without either o I i
brownish or bluish cost. It cotches every nuonce of tone thct the negotive contqins qnd renders delicote 1
hiqhliqhts os foithfully os the deepest shcrdow. It is the only developer thot opproximotes the quoiity of
the old-time plotinum prints.
Edwol-102 sqves pqper. Overexposed prtnts may be underdeveloped without the usuql muddy yellow
ctppecrronce, qnd underexposures mcry be cllowed to build up in the deveioper for {ive to six minutes
without fog or stoin. The chief cdvontcge, however, is in the quclity of the prints-PICTURES THAT
COMMAND ATTENTION
Edwql-106-For Toned Prints by Direct Development.
Edwol-106 produces worm tones on enlcrging pqpers qnc.
brown, green, orqnge, brick-red, ond sepicr tones on contqct
pcrpers. It gives plecsing results on lqndsccrpes, buildings,
ond portroits, ond is usefui for moking Christmqs cqrds qnd
other novelties.
Both Edwol-102 ond 106 ore &cilcble in stqndord size
cons mqking one-holf gollon or more of working solution, qnd
in lcrge size cqns mcking two gollons or more. Prices:
Edwol I02 or 106: Stcndcrd Ccrn. .$ .70
Edwol 102 or 106: Lorge Ccrn.. ...$1.75
Edwcl Fixers qnd Hcrdeners
Ail fixing cnd hcrdening solutions deteriorote with qge.
Edwol fixers ond hqrdeners qre pqcked in stcble powder
form in pint size pockoges thqt cqn be mqde up, used for
severql films while still fresh, ond then thrown out.
Acid Fix-The stqndcrrd fixer for Iilms or pclpers.
Price per cqrton (4 pint pcckoges) . . .40c
Chrome Fix-For Films. Imports extro hqrdness qnd
scrqtch resistqnce to the emulsion. Price per cqrton (4 pint
p o c k c g e s ) . . . . 5 0 c
Chrome Hcrdener-A sepcrcte hcrrdening bath for films.
For use between developing ond fixing. Price per corton (6
p i n t p o c k o g e s ) . . . . . . . 3 5 c
Edwcl Film Dryer-A SAFE dehydroting fluid for film cnd plotes. Rcpid. Economical. Hordens the
emulsion. Reduces drying time to o few minutes. . Valuoble for fine grcin work. Price (12 ounce boitle) . .45c
Edwcrl Film Cleaner-Removes greqse spots, fingerprints, wqter-
mcrks, dust from films, slides, negctive holders. Prevents qccumulotion
of stotic chcrrges which cquse dust to stick to film or glcss. Price (4
o u n c e b o t t l e ) . . . . . . 4 S c
Edwcl Ferrotype Polish-Insures the production of brilliont, glossv
prints free from surfcrcedefects.Price (4 ounce bottle) ........35c
You Ccrn Mix Your Own Edwql Developers
The pure chemicqls from which Edwol prepcrred developers ore
mqde qre mqnufqctured by Edwcl chemists or to Edwcl specificotions,
ond may be purchcrsed from your deoler. A description of these
products qnd formulos for their use qre contqined in "Modern Develop-
ing Technique" which mqy be hod free from your deqler or by sending
c 3c stomp to the Edwol Lqborqtories, Inc., 732 Federol St., Chicogo,
Ill. Use the coupon below.
Pieose send me q copy of the lotest edition of
"Modern Developing Technique." I enclose q 3c
stomp.
St. ond No.
City----Stote
My fovorite photo-mcgozine isView original page 5From the M. Butkus archive. Original publisher and archive notices are retained.
Check the model and edition against your equipment.
PDF verified 2026-10-10.