DE2160944A1 - Production of color images - Google Patents

Description

DR. BERG DIPL.-ING. GTAPF

PATENTANWÄLTE 8 MUNICH 8O. MAUERKIRCHERSTR. 45

21609U

• Dr. Berg Dipl .-! Ng. Stopf, 8 Munich 80, Mauerkircherstraße 45

Your sign

Your writing

Our sign

date

Lawyer accounts 21 840 Be / A

ILFORD LIMITED Ilford, Essex_ / England

"Production of color images"

Electrophotographic material usually contains a layer of photoconductive material that is on a support is applied and made electroconductive or a layer of photoconductive material deposited on a layer of electroconductive material,

Case 8-I.LF 897

209826/0 96 0

-2-

BATHROOM ORIGINAL.

this last layer in turn on one applied 1st * To create an image on a selchen electrophotographic material, the material is electrically charged »the charged material is then added image by image and at the points »where the light hits« the charge is dismantled » The picture is usually developed by "opening up." the material applies a toner that has particles »that adhere to the photoconductive layer at the points» that are still loaded. Ss let aögllob "to produce an electrophotographic flat material" and in the case of a proposed material of this type the surface of the photoleltfählgen layer a mosaic of places on »with each of these places selectively spectral to light γοη one of the three spectra red, green and blue sensl— have been bilized

The term "electrophotographic * farboaterial de" Mosaic type "as it is used in the following» means an electrophotographic material that is photoconductive contains a layer that is spectrally opposite to "more than one" Spectral range and eenelbilized in such a way was »dsJ every discrete point of the surface only opposite a« spectral range is sensitive to light ·

It is known that when a sensitizer has a dye A non-sensitized, photocell-able layer is applied to the deodorant surface, the surface itself through

-3-

209826/0980

absorbed sensitizing dye becomes photosensitive even if the lower portions of the layer of photoconductive substances do not contain a dye. It is therefore possible to form a mosaic of areas, each of which is sensitive to a different spectral range, by applying sensitizing dyes to a photoconductive layer one after the other using a screen pattern (raster) according to conventional printing processes _c It is also possible to create a mosaic pattern To form electrophotographic processes, for which, for example, a non-spectrally sensitized, photoconductive layer is charged in such a process and exposed to a light grid, the charge remaining on the surface in a sensitizing liquid is loaded with toner, which then sensitizes such areas of the photoconductive material _o Further scanning exposures , through which other areas of the material are exposed with the subsequent application of different sensitizers, enable the construction of the mosaic pattern of the color sensitization of discrete areas of the photoconductive layer.

Another method of making an electrophotographic Color material of the mosaic type is described in German Offenlegungsschrift 2,060,580

Another method of making a color image

209826/0960

would consist in imagewise exposing a charged electrophotographic color material of the mosaic type with colored light, the image pattern of the conductivity thus formed in the electrophotographic material being developed by treatment with a white or transparent pigment-repellent material, the pigment-repellent material being deposited only at the points that remain charged after exposure, or only at the locations that are complementary thereto, loads the electrophotographic material again, and in Ψ total with light from one of the spectral ranges, over which certain parts of the mosaic are sensitive, exposed, the product through Treatment with a color pigment toner developed, which is repelled by the pigment-repellent material in places where this pigment-repellent material has already been deposited, and the color pigment thus deposited is fixed on the electrophotographic material (A: German Patent Application 2108078.A) ₀

A multicolored image is formed on the electrophotographic material by a sequence of steps in which the electrophotographic material is exposed to light from different spectral regions to which the discrete areas of the mosaic are sensitive and is developed by a suitable color pigment. The process has the significant advantage that only a single exposure of the original (of which one wishes to take a photographic color picture) is necessary _{or the like}

209826/0960

In a similar process, a panchromatic sensitizer (pan-sensitizer) is applied to the material the imagewise exposure deposited in place of the white pigment. Before each subsequent color toning step is one Exposure to light of a suitable spectral range is required so that the entire areas of the rumen are sensitized discharged and not toned during the tinting process. It is therefore the overall effect same as with the deposition of a white pigment with particles of the repellent type (B: German patent application P 2135215.8).

Toners of the type described in A and B, which are used to provide a single, imagewise exposure of the electrophotographic Enabling color material can be called latent Image fixing agents will be referred to, and hereinafter will be such toners are referred to as "latent fixers" »

Now to show how a multicolored picture when using electrophotographic! Made of mosaic type paint material reference is made to the accompanying diagrams I, II, III and VIIB "

Diagram I shows an original that has eight ranges of colors, which are white and blue-green, purple, yellow, blue, are green, red and black. Negative II is made from this, which also has eight areas that represent the complementary

209826/0960

BATH ORIGINAL

colors of the colors of the AuDCßngüinatsriale are, namely swarm, red * green, blue, yellow, purple, blue-green and white · An electrophotographic material of the Monaiktypß shows the Idügramm III. l-ieoes' ksterial comprises aoht areas and ^ Eder of the areas of three parts, each .teile ": egenüber only one of the üiohtb £ _t ren -peittralberoiche blue, and red eplln eenoibillniört int, Liece areas oind in Liagramiii III

At A different tufon "will be used to Onea Mehrfarbenbildos in dm> Material de a iJiagrasima III · given below in einssc <LNEN Jüas hiugriism VIIB jseigt daa material after Undemtwicklungsi ·" or Tonungostufe.

If jsiua now looks at the ikitoriül shown in Idtißrticim VIIB in one, uo deceive in the area t., Ile three ötellon olnen woiöen Itiedernohlag, and eo lot dither the pure be dieoer -part knows what the area 1 of the uriginula entopricht. In the two lift two of put a white Niodereohleg and ainen blue green liiodersohlag, ro dess the Geotimtfarbe dißßeo Bereiohja blue green lot, and 2 diec enttiprieht the area to original »· In section 3 awei have the make a white Miidernchlüg and a purple. Precipitation, oo that the overall geographic color of this area is »purple, and dloo corresponds to the color of the areas 3 dee originals · Ia area 4 have two of the places

-7-

209826/0960

BATH ORIGINAL

one want to let down and the third a yellow Kie- deraciilag, so the QeOi.Lttf & color of this area is the same, unu dice corresponds to the i'orbe dots at * elehs 4 «2es Orif-inuls • Xu doiu fifth area Iu. t one other great one woi.-en liiüdercclilagt one a purple precipitate and the other oinr-ii blisugrtin.n precipitation, co that the öeoaiatfurbe dier-oB Bereioliis is blue, luid dioe entopricht dor color -> üi Β * r . iohf? 5 the ri £ -ini-lß. In the BerclGh 6 one has

share a v / ui.ien liiedcrschltig, one share a yellow '_:; iuderceiil £ ig and one divides * a blue-u ^ rün Hie-dei-colilug »to duJ üie öes; -r..tfurbe clieöes over green i £ it »and this ι iit.prii.lxt the color of the Jertichs 5 & © b -rigini.ls · In the area G liat eino dex ·» share a w «i8en lüederBCiiluss, eino

share a yellow Hiederaeixlag and a ttelle a blue « liiedertsoiilug, "oh there, the Geoumtfurbe diüsea Bereielis f and dien entoprleht the work of area 6 dea

In area 7 hat one part has a yellow precipitate and one part has a purple precipitate, so that the traditional color of the areas is red * and this corresponds to the color of the area 7 of the jigginule. In the area ϋ there is a · place a yellow precipitate, a place a blue-green one. Nieder-Gühltig and one part of a purple-colored Hiedorsohlag · ..e it ^; td;: her the üeaamtcolor flietaes üereichs oohwara, and dien corresponds to the eclmarsen Läereich 0 deo

^209826/0960 BADOR ₁ G ₁ NAL

Thus, one obtained in this way by using an intermediate negative and imagewise exposing the electrophotographic one Material about this negative is a reproduction of the original ο

It is to be noted that only a portion of each color in the graphs I, II and VIIB is shown for simplicity, but that of course the Rotteile of the final image a plurality of regions similar to the region ¹ J, in the diagram. VIIB shown include. In the red part of the final image, therefore, one third of this point will actually be white, one third purple and one third yellow, but the effect of a red part is achieved in the final image Material of the mosaic type in which the color toners coloring the areas of the mosaic are spread out in a controlled manner in such a way that final images are obtained which remain sharp but have increased color saturation »

In this new method of modifying a color image recording, made by means of an electrophotographic material of the mosaic type and what at least one is for Using two color toners as picture elements, the color image is made with the vapor of a liquid solvent or of solvents in which the color toners of the mosaic material

209826/0960

are soluble, so.behavior that the dyes in the surrounding Spots are spread out in a controlled manner.,

In a preferred embodiment of the present invention, the method of the present invention does so is used to improve the image of the mosaic type electrophotographic material, including the image by a process is made by exposing charged electrophotographic material of the mosaic type under a color original, the charge image pattern thus formed is developed with a latent fixer which is deposited only at the sites that remain charged or at the complementary points, then the electrophotographic material recharges and altogether with light from a spectral range to which certain areas are sensitive, exposed, coloring the material with a color toner; well at least one further stage in which the material is exposed to light from a different spectral range other parts of the mosaic are sensitive and toned with a different dye toner, this will be Image modified as previously defined.

Preferably after the imagewise exposure and the latent Image fixation stages the electrophotographic ma-

209826/0960

Material colored with three toners in such a way that a three-color image is created. It is advisable to use a yellow, blue-green and a purple color toner "

The treatment of the material colored with toner with the vapor of a solvent or solvents in which the color toners are soluble, causing the color toners to move from where they are applied to the surrounding areas Spread out spots. The length of time for which the material is steamed should be measured so that the Dye toner can spread into any surrounding area, but not in places far from where they were applied. In this case the uncontrolled spreading would result in complete obscuration or blurring of the color image. The exact time for the controlled spreading must be determined experimentally and is dependent on factors such as the The nature of the dye-toners used, the nature of the steam used and the temperature of the steam used, depend "

It is believed that the vapor condenses on the surface of the material in such a way that the dye is dissolved and spreads, but should not be allowed to condense to such an extent that it becomes a free liquid that can move as a mass and cause the colors to run. Spreading the colors is

-11- 209826/0980

mainly diffusion controlled, and it can be done that way by carefully adjusting the steam exposure time and the temperature, the distance at which each color spreads, can be controlled "Every color should spread like this that it is just merging with the color of the next spot of the same color. However, it shouldn't noticeably further spread, as this would lead to image blurring "

Therefore, when color toners are used with reference to diagram VIIB, in area 1 it is not a color toner present so that steam treatment cannot affect this area. In area 2 the blue-green Spread color toner into the adjacent two white spots, and the whole area will be colored blue-green, with the result that the Cy portions of the final image are colored more intensely blue-green. Similarly, this is true of the Areas 3 and 4 for the yellow and purple parts of the image white spots and into the purple spots, while the purple dye spreads into the white spots and will spread into the blue-green spots, it will therefore the whole range by the coexistence of the cyan and purple dyes in each of the spots forming it colored blue. This applies in a similar way to area 6, where areas are yellow and those with cyan dye are present, so that the entire spots

209826/0960

of the area are green, and in area 7, where both yellow and red dyes are present, a red coloration _{or the like} is obtained at all points in the area. Finally, in area 8, where yellow, purple and blue-green dyes are present, the areas of the area of color become black »

It should be understood that yellow, cyan, and purple color toners can be applied to the exposed electrophotographic material in any order, but it is desirable that a preferred order of application be followed. In particular, the process of the present invention can be carried out according to the procedure described in the following example, in which it is important that the dyes are applied in a particular order. It should be noted that a mixture of solvent vapors is used to treat the material can become f if, for example, all of the toner dyes are not soluble in a single solvent. After treatment in a solvent vapor, the material can also be treated with another solvent vapor or vapors

Some of the measures provided for use in the present invention toner dyes are commonly referred to as pigments, for "B" E ₀ DI FASTEL Pink B, followed later

209826/0960

liier still Boaug geiiuxriiii will ·. »eil ^ euooh this material in liiiaöth ^ lforriaiaid löclicU Xat ₉ kuim it old? Dye aageotih & n »if it is in Ltteunc in Uieaem solvent.

At öinor hiotlltltsL ^ vuni. The temptation of the present invention is to create a hairstyle for a hairstyle on which it was dyed before it was treated with the solvent vapor. in which the tinted toners are not soluble; 3ind. After evaporation of the solvent inuö uie ox dry te Hurzsahloht X'ühi ^ uoin, the Luoungsmitt ·! - steamed with the due material afterwards treated v ^ ird "to absorb" uüarend the iu ^ iuundlun ^; de »^ loteriölö with the

solve <.ioli the i. ^; arbotofftoner in the ttöleichter "if the il & rseohioht present" and the I'ürbßtofftoner hike in cewiuaem ivuemaB in the iiara- & ahiuht Bolbut "yielding ^ ndbilder with increased Farbintcnuitüt" continues to receive more precise control of canoe

g by using a suitable which uuf the iarbotofftonorn before the treatment lait the Löcungtsmittöldumpf is uufgebrtioht, achieved will"

suitable iiarsi is a slow-curing / ilkydhore «

e iiitühüliic U92 · Dovor Uieooe liarz complete

-14-

^209826/0960 BADOR.G1NAL

is hardened »it becomes iJimethylfoixoiiaid oiler ethyl alcohol absorb, taking the lonting oil in the seducer who present invention find extensive use

suitable yellow! oner is made using Eiton Xellow 2GL · this dye eats iai Color Index ela Acid ίβΐΐον; 17, OX 18965 not given. He cum. in the following formulation used «earthy

2.0 g Kiton 'fellow 2 Qh 2.0 β aitcbaliiC 1092
0.2 g i.luiainlumctearut
20 ml Xßopur Q

Above ^ ngegobtmen 3eu tend parts are 2 hours one Comminution is generally subjected to the Kugol mill and reduced to 500 ml diluted with Xuopar G asur use «

Ilitchulao 1 ".) 92 lot an Irmgfcettiges ulelkydher * on üo ^ a— beansUlba ü

Xüopar G eats an odorless, aliphatiBohor carbon dioxide.

A suitable urpurtoner is produced using KCI Fuotel rink B hergoatellt · I, i «ö tat a x ³ hocphormolyt> thin-» iolfrömat-Pigmont, in the color index ^ Ia Jrigiaent "01, ül 45160 not registered the following iOnulation

-1D-

209826/0960

BATHROOM OBlGlNAL

applies v / earth ι

2.0 (ζ KBI Pößtel Plnfc B
2.0 g Mitohalac 1092
20 ml Ioopar G

The ingredients listed above are used in the 20 hours treated and with 500 ml Isopar G eur use

diluted

Bin appropriate blue Gruner toner is produced using iicoÄupan Blue ILE · liies 1st one Kupferphthalo- cyiinin-Ferbßtoff, & * x izi Color Index els Solvent Blue indicated 70 * OZ 74400 »voboi jedooh as other Kupferphthölocyanin specified in the Color Index, soluble" - Tinting substances, in some cases Solvent Blue 25 »CI 74350t Solvent Blue 35, ΟΙ 74400 and mrect Blue 86, GI 74180 used
can be used in the following Ponaulie

1.0 g Heosepan Blue FLB
2.0 g of itohölüio 1092
0.1 β Aluniiniuraoteorat
20 ml loopar ö

The x> eat «nil parts given above will be oiner for 40 hours

»Submitted and then on 5 ¹ ^ t ia ±" t

pre-thinned for use

-16-

209826/0960

ORIGINAL

VÜbi-enöL Üeossiipon Blue MM, and Klton Yellow 2 QL in. Many solvents lifclich ^ ind »iat KDI Jtentel Pink B relatively insoluble. However, all three are soluble in dimeth yli "onnamid. A suitable method of adding dyes to photographic material that has been dyed with three tinted substances is that the paper is brought into dimethylformtimide." * if dee Dimethyli'ormaaid is used at a temperature of 25 ⁰ C "det the Aunbreiten in about an hour instead · when but since ο HmethyliOrmuaid at 72 ⁰ C used dae Auebreiten takes about a minute · the color" ground without sufficient Veiling deo images spread out "and because the colors take on a gxtä & er * i part" craohein * n never

Ed it; t Sound Meaning "that u & u flücßige ilupergiermittel, the sur ^ oraullcruns the ifarbEtofftoner-Llopereioncn for applying txuf the exposed clektrofotografieche material provided iet * not any of the color toners used in the Uyctea lot _s; ollte · leopar G i & t a suitable iiiEipergicrflUui ßkelt »because most suitable carbcitofl'toners do not dissolve in it

The following example explains the invention

i -17-

209826/0960

example

Manufacture of non-sensitized, electrophotographic! material

Zinc oxide is ball milled for 24 hours in the following formulation

30.0 grams of zinc oxide

4.2 g E87-09 resin, 20.0 ml toluene

The zinc oxide is Imperial Smelting Fotofax, E 87-09 resin is marketed by Gray "Valley Products Ltd. of St. Mary Cray, England

A further 15 ml of toluene are added to the formulation, and the zinc oxide suspension is applied by dipping to a thickness of 25 g / m 2 on Arjomari Prioux (from Usine de Rives, Prance) conductive paper backing

Manufacture of the sensitizers:

Sensitizers for the blue, green and red spectral ranges are made as follows:

Blue sensitizer:

20 mg! Dye of the formula

-18-

209826/0980

ORlGiNAL INSPECTED

H ₂ O

C &

X /

are in 40 al methanol gel Oct. 2Ö g ffotofax Zinico.xid wcr w stirs the oinii and turns the susponotoa into xrooicne.

Hach further 24 ~ ßtfindigem froolcnen at 50 ⁰ C is that farbuemiibilioierte zinc oxide 2 in the following Jtundcn * ormulleruug a Kugelmühlonbciianaiun ,; subject »

5.0 g color-sensitized zinc oxide

2 _t ü g DOJaülraodifisiertGB Alkydhare (Mithl tö92)

20 ml geruohlooee Pam ff in (looper G)

Dl »cuopension is diluted with ^ GO si with I no par G« for use.

Grünuenuibiliaatort

The Grünoenaibilieator is produced in a similar way as the ßltiuoenoiüilioator _t uuegenoanen, which is used the dye 4 <O £> e htn & Al (CI 49440) and 60 mg are dissolved in 40 ml of methanol

. -19-

^209826/0960 BADORlG ₁ NAt

Red sensitizer:

The red sensitizer is made in a similar manner to the blue sensitizer except that the dye used is Patent Blue V (GI 42045) ₀

60 mg are dissolved in 40 ml of methanol and the final formulation is subjected to ball mill treatment as follows:

2.0 g color sensitized zinc oxide 2.0 g Mitchalac 1092 resin 20 ml Isopar G-

Sensitization of the zinc oxide paper:

The non-sensitized zinc oxide paper is charged by placing it under a corona wire with 10 KV negative Voltage passes through. The same corona wire is used for all of the charging activities described in this example and normally delivers a charge of 200 YoIt. The paper is made up of a grid of lines a 100 watt tungsten lamp, distance 30 cm, 0.25 seconds exposed This lamp is used (with or without a color filter) for all exposures in this example The line grid has black lines half the width of the intermediate spaces or »passages and a distribution of 120 lines per cm “The remaining charge will toned by holding the paper in the blue sensitizer for 2 seconds and drying it in a stream of warm air «

209826/0960

Doo paper is reloaded »uniformly with light (lli'ord filter 3 ^ 3 _f 0J5 and βϋ3 combined) ü _f 5: ek. exposed and then with a line grid using unfiltered light j, 2 $ -ek. exposed * Diener Linienr & eter asked for a distribution of 120 lines per en »above the line width corresponds to the intervening interferences. The remaining charge is toned by holding the paper in the green nibiileator 2 and then drying it in warm air.

Da8 paper is once again colored and uniformly old blue Ucht (llford filter 303 »8Q5 and 809 combined) 1,5 uek · exposed »The Terblcibendc charge is toned, da j Dun daο paper in the red elbow biluütor 2 uek · wraps and dries in a warm stream of air »

ims Pe pi er is now old to a Moaeik ran bleu »green and red sensitive parts» en & ibilieiert and «ready for use *

Horetellung of pimento abstoüenden toner t Cc, the following formulation is ctd 20, a KugelmUhlenbehändlung under absorbed and then diluted UUF 5a.j ml nit Ieopür Q * for use.

6 _t 0 g titanium dioxide 8.0 β i-litühultc 1092 40 ml laoper Q

209826/0980

⁵⁴⁰

Image exposure and latent image fixation Lud ucnulblliolerte iepior v / ird and exposed on a dye positive for 2 seconds. Illtor kürmon can be used, uixi den iarbuutijli.ich »« owoit orforderlioh.

XIc remaining after exposing charge vird characterized toned "that due Ha pier in the Piynunt tibatoßonden toner 2 far. holds and then dries in a warxnon air stream. I »e lepior hot now a iiild in the χοτά de« latent fixing agent (i.e. pigment obotoi'ienden toners)

Horötollun **: from color tonorni Yellow "bluish green and purple toners" grounds as follows

manufactured!

Yellow ions

The following formula is subjected to a ball oil process for 20 hours and diluted thinly to 500 ml with Xsoper 6 but using

2.0 g Kiton Yellow 2 GL (CI 10965) 2, Ug Mitchalao 1092 liar »0 _and 2 g aluminum atearate 20 al leopar Q

Liquid green ionized

uio the following? ormulieruo £ is subjected to 40 hours of a "ball missile tracking" and then only 500 al with looper G but

-22-

209826/0960 _Mn

BATH

- 22 -Use diluted.

%, QB lleosmpon Blue ILE (GI 74400) 2.0 β AÜtchalao 1092 Hör * O ₉ I g AluBinittmoteer & t 20 ml Ioopar G

Purple clays

The following formulation is subjected to an ICugolB & hlverfuhren for 2 hours and then diluted to 500 al with Iaop & r 0 max use «

2 »ü e £ X> ~ I FüDtel i> ink B (CI 2.0 £ MitchaXao 1092 liars 0 | 2g aluminum atearet 20 el loopwr G

Tone"

. The toner »grounded in the order listed (d. H" yellow, bleugrlin, purpiir) verwandet, can be exposed "o duü the Materiel front" ground * J> he Gclbtonor etöüt both the bleu green vjle from the purpurnon Toner _f while the cyan

Toner also ebotöüt the purple toner.

De * paper "it de" negative image in ^ o "of the latent image flux is eo toned" that the positive image never follows »iohtbar wirdι

• 25-

209826/0960

BAD ORDINAL

Tea Püpler v. 'Is loaded, insgoiiomt old yellow light (Ilford -liter 110, 005 and 009 combined) 0.5 seconds exposed » da mi 2: .ekunclen held in the yellow toner and suletst in one vmraeti air dried οία

v / is reloaded in: gesaist with lead-green light (Ilford filter 303, 805 and 0J9- combined) 2.5 -ek. exposed, 2 ek hulton in a blue-green toner and then dried in a stream of air

luü paper is reloaded, inagesüiat with red light (Ilford filter 2ϋ £, Qj *> and 809 combined) 9 »* k ·, then int ^ eeaEit alt blue light (Illord filter 0ü6, 80 $ and 009 combined) 9 < ek · beilohtet, then in ice · »Purpurtcmer 2 seconds, held and dried in a stream of warm air.

Purbrd. “Chung s

iita-Iilmethyliormemid "is ^{heated to 80 0} G and 4-color printing 4 $ vT-ek" sum Miss above the colors held in the steam.

receives a positive color print of üriglnalnegiitive where the Farbtonerln ^ eoteuerter fteise In the surrounding 'share · Dan Color were useebreitet »1st after FarbmleohTerfahren Dchorf and hat increased FarbuUttigung la compared to the image on the one electrophotographic Ftirbnmtori- άυ, ΰ v" le voroutigehoncl described manufactured and ge *

-24 «

209826/0960

BATH ORIGINAL

tont vurdc »rabci jo.'och io ^ lulbild -. 'ti; steps Iu ca on ν, -urdo

2U9876 / 0 960

Claims (2)

- 25 patent claims: T) Method for modifying a color image recording that made by means of a mosaic type electrophotographic material, and the at least two color toners contains as image-forming elements, characterized that you can make the recording image with vapor of a liquid solvent, in which the color toner aes mocaimmaterials are soluble, treated so that the Colors spread out in the surrounding areas in a controlled manner will. 2. The method according to claim 1, characterized in that one treats a color image recording in the manner indicated, which was produced by a method in which charged elektrofotografiscb.es material of the mosaic type is exposed with a color original, the charge pattern thus formed with a latent image fixing agent, which is only deposited in the areas that remain charged or that are complementary thereto, is developed, the material is recharged and exposed overall to light from a spectral range to which certain areas of the mosaic are sensitive, the material is tinted with a color toner and after at least one further otufe, wherein the material with light of a different _{.jpeKtjr-albereicha;} One over the other parts of the mosaic '> f) ^r ) H? f, 'O <) fi ü BATH 21609U Are sensitive, exposed to light and toned with a different color toner _e 2 0 9 8 2 6/0960