Agfa Formulas for Photographic Use

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PRICE 10 CENTS

CONTENTS c~tUMI5TitY

Adutto.. .•

FOR THE PHOTOGRA.PHER . . . . ••..••••••••.•••..•

CeaM~~woiiOII ol~MMt-tu•lln4 ltaP«D.twta ••• Co.nPOAiffth •lid aa.~ o( dCYdO~n. ,, , ••••• Co.pouuoe~ aed 11114Kdoo o( bu-••••••••••••• l)c•ifloprr ,,Ju•Mioft,, •••••••••••••••••••••••

lapol1ll•C• aad

•.ll• of

~·stop,,,, ••••••••••

S.••nrkl"' Cor tro.bl«·frn .nniq .... . . . ... .

ALP H ABETICAL

AOFA FORMULAS

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ee-doPtt"....... .. ... .. ... .. .. . . .. ...... .. .•

••'

Redw..,.._lfMgwk:f,,, ,,, .................... TOMn., .................................... . .. .,.d Clf'O«•..l•& INOt•ciOPeed. Many photographers have found a convenient, ccrrajn and economicAl method of insuring compJcte fixulon lies in the usc of two fixing solutions. Fixing Js carried out first in the more used of the cwo baths and finally in the fresher solution. When the older b>rdy IJ$Cd solution tokes irs pl•ec and a fresh 6xin$ bath is prcp.red for the $CCOnd soluuon.

SUGG£SnONS FOR TROU8Lf• RIU MIXJNG

The fint aod perhaps most important point to foUow 10 tbe preparation of solutions is tbat o( using cbcmicals which are

s

"phmo~rophically pure". Cheap commercial grade1 of every cbemic:.tl used in J;,hotographoc processes can be obramcd, but m2.0y of them coota.an impunucs which arc: dcmmcnral tablc if the amount of

impuriry present is know~ to be msig~f..

icant. T111s can be dercrmmed by looktDg up the U.S.P. stand>rds for the chc:micll in qucsuon by consulting the edition of the Unued Srates Ph:amucol?'"· tenth edition (1925) or eleventh ediuon ( 1935) as iodocated by the number X or X l which fo!Jows the U.S.P. on the chcnoical container l:~bcl. The KCond most amponant rule for lOU

5v..,. 1s va•ns

S OIIDCiCio I 01. 40 r;t. 7 0W11C0 n OLtoJt.

l

1

8 .,.... 50 ....... Uett

h OL 10 g . IJ 4 oancct

)l

ounca

a:illoa

Do OOt dilute for ut-e. Nonn.t.l dcvdori.ng dnx S co 8 muuue~ at 68 F . (lo• C.).

9

DEVE L OPING FORMULAS AGFA 30

X·RAY DI!VIli..OPUR Thi' dcvdopct il r«ftcr fok,etormcnt of 8roTir& dilute" 1 tO 4. Dc,·dop l't 10) m1nu1~. at 6S• F. ·20• C..J. •Rc:-' u.ed (onn.

lG

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DEVILOPING FORMULAS

AGFA 110

DIR£CT BROWN-BLACK PAPER DEVELOPER Ek-auriflll "urn tOOD m.ay be obtaaru:d with this dc~Jopc:r Oft botb COC\t.ICC. and rroJ«:tioc P~· Stld Solvti•

Mrtru Hoc Wut:c ( ll_s• F. or 32• C.) • AJfa HydroquinollC ... . , • , , • Asfa Sodium Sulphite, Mhfdtout ...... . Atefa Sodium Carbonate, n10ooh)•draacd. At,la Pot&.~;ium 6ro1nidc .

1.SO cc. 22.) sraml

24

It

OUOtel

.)

qustts

OIIOCC

}

ounces

.S7 gram1 l~ o:c. ~gr. 15 granu 2~ 0\U)CCJ 1.75 gumr lh OL 60 tJ•

4-'- ~ ounces ,.,, ounces 1,

I

ouna:

gallon

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DEVELOPING FORMULAS

TWO-TRAY PRINT DlVUOPMENT

Wru le rhc majority of photographiC printS can be prepared most conveniently by development in a single Jolutioo, some occasiODS are often met in which the aitic:tl n>ture of the subject rcqu~rcs a degree of coorrol o'er contrast that is not normally available. In such iiUtanccs the rwo-rray prioo ~·elopment procedure can be employed to good .advantage, for ir permits :t nicc:ry o( control over rrint gr.adat1on chat c:a.nnot be obtained by usual variations of exposure and developing time. The cwo--uay proc:cclurc iovolvcs the use of cwo .separate: dc\~cJoping solutions. usually a soft-worklng formuJ., such as AgC. 120, and a brilhant-working dc:'dopcr, like Ag(a 1)(}-though some workers ptefer the combination of Agfa 120 and 125. Development is begun in one solution and completed in dtc other, the firu dc:\'doper used having the greater effect. Tbu procedure is particulatly helpful in producing full. scale ptinu which exlublt wdl modulated gtad.rion in both boghligbr and shadow.

AGFA 1;tS

P.-PER .-NO FILM DEVELOPER Thi•lorn~ula b recocummded lor dcvelopmcnc of Cykon. Cykon:, Urovira. ~pen. It ua .aJso ~ ustd lor d~,·dopmeftt ol rull, ~ck and sheet film when

Convira, lncfbcone and si.mUar brilliant ntgad\'tt uc desind.

It may be: obtiiiard ic puJcap form by orderins Ash 12S Deftloper.

Mmtr

Hot Wat('f ( 12)• F. Of .51• C.) At)~ Mnol Ap Sodi. . SWphn' Alwzucpi.a-COC'la. ~

Hot Waur ( 113• F. or j.l• C.) .. •Ammonium Su!rhocyanatc . tGold Chloride, 1% Solution .

A""'•tt•.t

J.f.t-rm

. .. no " ·

14

Ia) lfanll

ouncu

)}{ OWl«S

60 ce. 1 ltuid o~. 1 lit« Jl OunGc.s For Red Tone~; l'rinu IIIUH fim be bleached and toned by sulphide rcdc.vcloplne•n method ( sec: Asfa lll). Alta wuhlng, place prlntt ln aho,•c: solution until t01'ing is cornrfccc (rcqulrct 1S•4S ll'llnuc·n ). For redder tones onc·hall the .-pccif~-td • •no,mt of 1ulphoqanatc: may be used. For Dttf Blue To.,es: Ornh .cpia toning opcutioo and place wdl-wuhtd blaclc-~nd .. whiu: printS direcrly \V~cr CO

make

i.n above coa ao,~ .ohuioa.

For Mb:cd Tonct : Prin lJ should be incoroplctt:ly toned in a Hy-p0 Alum Toner, tuch as Agfa Ul, aocl washed.

before

D't:almtnt

io abov-e IOiutioa,

AGFA 241

IRON BLUE T ON!!R

Produd na l!rdliaoc bluc: tono, tbjs lotmuJa is suitab1c (cw Uk whh Cr lcora, Urowlra and tndiaronc Papcrt. Hoc \\'1uer ( llj 0 f . or .)1' C.). F'c:rric Ammonium Cht-Atc , Ag(ll Pora~si u111 Fe~~i~y anidc: •• l\g(a Acetic Acid, W?o. .

Water co make:

M ttnt

Anlnht,.IJ 16 OU.I'lC.ct

. .)00