DK157216B

DK157216B - PROCEDURE FOR XEROGRAPHIC PREPARATION OF RELIEF PICTURES AND TONER MIXTURE FOR USE

Info

Publication number: DK157216B
Application number: DK436675A
Authority: DK
Inventors: Ezekiel J Jacob
Original assignee: Ezekiel J Jacob
Priority date: 1975-09-29
Filing date: 1975-09-29
Publication date: 1989-11-20
Also published as: DK436675A; DK157216C

Description

- i -- i -

DK 157216 BDK 157216 B

Den foreliggende opfindelse angâr en fremgangsmâde til xe~ rografisk fremstilling af relieibilleder og en tonerblan-ding til brug herfor.The present invention relates to a method for the xerographic production of relay images and a toner mixture for use therewith.

Sædvanlige tryksager og xerografiske kopier er ulæselige 5 for blinde eller svagtseende, fordi de trykte omrâder kun kan adskilles fra omgivelserne ved hjælp af ojet. Modsaet-ningsvis er blindetryk, brailleskrift, ulæselig for de fle-ste normaltseende, fordi der anvendes et særligt alfabet.Ordinary printed matter and xerographic copies are unreadable 5 for the blind or visually impaired, because the printed areas can only be separated from the environment by the eye. On the contrary, blind print, braille writing, is unreadable to most normal viewers because a particular alphabet is used.

Relieftryk bestâr for teksters vedkommende af sædvanlige 10 bogstaver, der ved prægning eller eksempelvis stâltryk er hævet over omgivelserne. Relieftryk kan sâledes læses af sâvel normalt- soin svagtseende eller blinde, men fremstil-lingsomkostningerne er forholdsvis store, og det er kun med besvær og store omkostninger muligt at frèmstille relief-15 tryk ved hjælp af eksempelvis et xerografisk kopieringsapparat.Relief prints consist of the usual 10 letters, which are raised above the surroundings by embossing or, for example, steel prints. Relief prints can thus be read by both normally visually impaired or blind, but the manufacturing costs are relatively large, and it is only possible with difficulty and high costs to produce relief prints by means of, for example, a xerographic copier.

Fra beskrivelsen til US patent nr. 3.589.29D kendes en xerografisk metode til fremstilling af reliefbilleder. Denne metode indebaerer en gentaget lag-pâ-lag opbygning af de op-20 hojede partier og er sâledes omstændelig og tidskrævende, hvorfor fremstillingsomkostningerne er store.From the specification of US Patent No. 3,589.29D, a xerographic method for producing relief images is known. This method involves a repeated layer-by-layer construction of the raised portions and is thus cumbersome and time consuming, which is why the manufacturing costs are high.

Formâlet med opfindelsen er at anvise en fremgangsmâde ved fremstilling af reliefbilleder ved xerografiske kopieringer uden de omtalte ulemper ved den fra US patent nr.3589.290 25 kendte fremgangsmâde.The object of the invention is to provide a method for producing relief images by xerographic copies without the mentioned disadvantages of the method known from US Patent No. 3,589,290.

Dette opnâs ifelge opfindelsen ved, at man som toner anvender en tor, risledygtig, elektroskopisk· og.termohæftende pulverblanding, der er opskummelig ved varmepâvirkning el-lere en saedvanlig toner, hvortil der er sat et stof, der er 30 opskummeligt ved varmepâvirkning, og at kopiarket umiddel- bart efter, at toneren er pâfort, udsættes for enThis is achieved according to the invention by using as a toner a dry, rice-resistant, electroscopic and thermo-adhesive powder mixture which is foamable by heat effect or a conventional toner, to which is added a substance foamable by heat effect, and that the copy sheet is exposed to one immediately after the toner is applied

DK 157216BDK 157216B

- 2 - opvarmning til fiksering og opskumning af toneren.- 2 - heating for fixing and foaming the toner.

Ved en sædvanlig xerografisk kopiering udsættes kopiarket, efter at toneren er pâfort, for en opvarmning, der har til formai at fiksere toneren. Til fremstilling af 5 reliefbilleder i et xerografisk kopieringsanlæg skal man aitsa kun drage omsorg for, at den anvendte toner indeholder komponenter, der svulmer eller skummer op under tonefikseringen.In the case of conventional xerographic copying, after the toner has been applied, the copy sheet is subjected to heating which is capable of fixing the toner. For the production of 5 relief images in a xerographic photocopier, one only has to ensure that the toner used contains components that swell or foam up during the tone fixation.

Opfindelsen angâr, soin nævnt, ogsâ en toner til brug ved 10 udovelse af fremgangsmâden, hvilken toner er af den i krav 2‘s indledning angivne art og ejendommelig ved det i den kendetegnende del af krav 2 angivne. Den i kravene anviste toner er ikke - eller kun i uvæsentlig grad - dyrere end sædvanlige tonerb1andinger.The invention relates, as mentioned, also to a toner for use in the practice of the method, which toner is of the kind specified in the preamble of claim 2 and peculiar to the characterizing part of claim 2. The toner specified in the claims is not - or only insignificantly - more expensive than usual toner blends.

15 Opfindelsen illustreres ved de efterfolgende eksempler.The invention is illustrated by the following examples.

Bksempel 1Example 1

Til 100 volumendele af en sædvanlig toner til en xerogra - fisk kopieringsmaskine tilsættes 0,1 volumendele opskumme- lige mikrokugler. Disse mikrokugler fremstilles som et 20 pulver bestâende af vinylidenchlorid-acrylonitril-isobutan . -3 med en partikelstorrelse pa mellem 0,5 og 20 x 10 mm.To 100 parts by volume of a conventional toner for a xerographic fish copier, 0.1 parts by volume of foamable microspheres is added. These microspheres are prepared as a powder consisting of vinylidene chloride-acrylonitrile isobutane. -3 with a particle size of between 0.5 and 20 x 10 mm.

Denne blandingstoner giver ved brug i et xerografisk kopi-eringsapoparat billeder, hvis tonerfelter er hævet over papiret. Ved 25 gange forstorrelse fremtræder tonerfeltene 25 med grynet struktur som brune eller sorte balloner, der er tætpakket og ikke som sædvanligt for xerografiske kopier med en smeltet og storknet lavastruktur.This blend toner, when used in a xerographic copying device, provides images whose toner fields are raised above the paper. At 25x magnification, the grainy toner squares 25 appear as brown or black balloons that are densely packed and not as usual for xerographic copies with a molten and solidified lava structure.

Bksempel 2 Ved brug af: 30 toner som i eksempel 1 100 vol.dele opskummelige mikrokugler 1 vol.del - 3 -Example 2 Using: 30 tones as in Example 1 100 vol parts foamable microspheres 1 vol part - 3 -

DK 157216BDK 157216B

« opnâs, ved xerografisk kopiering, tonerfelter, der hæver sig 0,025 mm over omgivelserne.Toner fields that rise 0.025 mm above the ambient are obtained by xerographic copying.

Eksempel 3,4 oq 5 Ved brug af: 5 toner som i eksempel 1 100 vol.dele opskummelige mikrokugler henholdsvis 5-7,5 og 8 vol.dele opnâs ved xerografisk kopiering tonerfelter, der hæver sig 0,05 - 0,065 og 0,075 mm over omgivelserne.Examples 3,4 and 5 When using: 5 toner as in Example 1 100 vol. Foamable microspheres 5-7.5 and 8 vol. Respectively, obtained by xerographic copy toner fields increasing 0.05 - 0.065 and 0.075 mm over the surroundings.

10 Eksempel 6 Ved brug af: toner som i eksempel 1 100 vol.dele opskummelige mikrokugler 20 vol.dele opnâs ved xerografisk kopiering tonerfelter, der hæver sig 15 0,15 mm over omgivelserne- Dette er tilstrækkeligt til, at en blind eller svagtseende person kan erkende konturerne ved beroring.Example 6 Using: Toner as in Example 1 100 vol. Foamable microspheres 20 vol. Parts are obtained by xerographic copy toner fields that rise 15 0.15 mm above the ambient- This is sufficient for a blind or visually impaired person can recognize the contours by touch.

Eksempel 7 Ved brug af; 20 toner som i eksempel 1 100 vol.dele opskummelige mikrokugler 50 vol.dele opnâs ved xerografisk kopiering tonerfelter, der hæver sig 0,15 mm over omgivelserne.Tonefelterne er imidlertid dunede 25 og ikke fikseret pâ underlaget, fordi opvarmningen i forbindelse med den sædvanlige xerografiske fiksering ikke har varet længe nok. Ved efterfolgende opvarmning i ovn til 135°C hæves tonerfelterne yderligere til 0,25 mm. Efter denne opvarmning kan kopiarket sprojtes med klar lak, 30 hvorved tonerfelternes hojde. reduceres til 0,2 mm pâ grund af lakkens oplosningsvirkning.Example 7 Using; 20 tones as in example 1 100 parts foamable microspheres 50 volumes are obtained by xerographic copy toner fields which rise 0.15 mm above the surroundings. However, the tone fields are down 25 and not fixed to the substrate because the heating in connection with the usual xerographic fixation has not lasted long enough. Upon subsequent heating in the oven to 135 ° C, the toner fields are raised further to 0.25 mm. After this heating, the copy sheet can be sprayed with clear lacquer, thereby increasing the toner field height. is reduced to 0.2 mm due to the dissolving effect of the paint.

- 4 -- 4 -

DK 15 7 216 BDK 15 7 216 B

Det sâledes fremstillede kopiark kan benyttes soin et sæd-vanligt gummistempel eller en trykkeplade.The copied sheet thus produced may be used as a conventional rubber stamp or printing plate.

Eksempel 8Example 8

En opskummelig toner kan fremstilles uden brug af opskum-5 melige mikrokugler ved anvendelse af stoffer, der frigiver luftarter ved opvarmning. En passende toner kan sâledes fremstilles af: "Staybellite Ester 10" 100 g lO "Silica Aerogel" 5 gA foamable toner can be produced without the use of foamable microspheres using substances that release gases upon heating. A suitable toner can thus be made from: "Staybellite Ester 10" 100 g 10 "Silica Aerogel" 5 g

Carbon Black 5gCarbon Black 5g

Gutta Percha 10g "Nitrosan" 5 gGood Percha 10g "Nitrosan" 5g

Disse komponenter pâ nær sidstnævnte blandes i en gummimol-15 le ved 60°C. Ved hjælp af et skrabeblad aftages blandingen og ledes tilbage mellem de to valser. Efter koling til 40°C iblandes "Nitrosan". Blandingen aftages med skrabeblad fra de vandkolede valser og males til partikelstorrelse under _3 74 x 10 mm. Den opnaede toner hæfter godt til kopiark ved 20 opva'rmning og foroger da sit volumen 5-10 gange. Det inde-holdte Gutta Percha frembringer kraftig forskumning og adi-abatisk varme under blandingen og er efter afkoling meget skert, hvilket letter formalingen. Efter formalingen til-fojês toneren "Silica Aerogel” for at holde den frit 25 rislende og hindre sammenpakning. Ved xerografisk kopiering opnâs tonerfelter» der hæver sig 0,05 mm over omgivelserae.These components, except the latter, are mixed in a rubber mole at 60 ° C. Using a scraper blade, remove the mixture and return between the two rollers. After cooling to 40 ° C, "Nitrosan" is added. The mixture is scraped off with scraping sheets from the water-cooled rollers and ground to a particle size below _3 74 x 10 mm. The toner obtained adheres well to copy sheets at 20 warm-ups and then increases its volume 5-10 times. The contained Gutta Percha produces strong foaming and adiabatic heat during mixing and is very depleted after cooling, which facilitates grinding. After grinding, the "Silica Aerogel" toner was added to keep it free of wrinkling and prevented packing. Xerographic copying achieved toner fields "that rise 0.05 mm above ambient eye.

"Nitrosan” er N,Nf-dimethy1 N,Nr-dinitrosothalamid. Ved termisk dekomponering ved 80-100°C frigives nitrogen. André 30 stoffer, eksempelvis azo-blandinger, sâsom azodicarbonamid, azpisibutyro-dinitril og benzensulfohydrazid, eller aminer, sâsom dinitrosopentamethyltetramin, kan ogsâ benyttes. Det plastmateriale, hvori det luftartafgivende middel er inde-holdt, kan være et vilkârligt termohæftende materiale, 35 forudsat det er tort og fritstrommende ved stuetemperatur,"Nitrosan" is N, Nf-dimethyl1N, Nr-dinitrosothalamide. Upon thermal decomposition at 80-100 ° C, nitrogen is released. The plastic material containing the gaseous release agent may be any thermo-adhesive material provided it is dry and free-flowing at room temperature.

DK 157216 BDK 157216 B

- 5 - altsâ eksempelvis vinylharpiks, styrenharpiks, acryl- og acrylcopolymerharpiks, celluloseesterharpiks, . polyamid, phenolharpiks og copolymere heraf, butadienharpiks, poly-ethylen og polyolefin, Forholdet mellem den terffiisk ustabi-5 le komponent og plastmaterialet kan variétés.Thus, for example, vinyl resin, styrene resin, acrylic and acrylic copolymer resin, cellulose ester resin,. polyamide, phenolic resin and copolymers thereof, butadiene resin, polyethylene and polyolefin. The ratio of the teraphically stable component to the plastic material can be varied.

Eksempel 9Example 9

En opskuramelig toner, der kan erstatte den sædvanlige xero-grafiske toner, kan fremstilles af: poly-n-butylmethacrylat 1G0 g 10 poly-iso-buthylmethacrylat 100 g tri-ortho-cresylphosphat 5 g dibutylindilaurat 2 g butyltindilaurat 2 g opskummelige mikrokugler 5 g 15 olie-oplsseligt sort farvestot 1 g carbon black 10 g aluminiumhydrat 5 g "Silica Aerogel,‘ 1 g der tiltares en to-valset guimnimalle i den nævnte række-20 falge under opvarmning til 110°C. Mikrokuglerne vil herved opskumme og smelte og blive en del af blandingen med und-tagelse af deres isobutaninindhold, der gâr tabt. Hensigten med iblandingen i malien af mikroküglerne er at skabe affi-nitet for opskummelige mikrokugler, der senere tilblandes 25 det formalede produkt, hvis partikelstarrelse er mindre end 74 x 10 ^ i volumenforholdet 5:100.An upgradable toner which can replace the usual xerographic toner can be made from: poly-n-butyl methacrylate 1G0 g 10 polyiso-butylmethacrylate 100 g tri-ortho-cresyl phosphate 5 g dibutylindilaurate 2 g butyltin dilaurate 2 g foamable 15 oil-soluble black tint 1 g carbon black 10 g aluminum hydrate 5 g "Silica Aerogel, 1 g a two-rolled rubber in the above-mentioned range, fall to 110 ° C with heating. The microspheres will thereby foam and melt. become part of the mixture with the exception of their lost isobutanine content. The purpose of the mixture in the malies of the microspheres is to create affinity for foamable microspheres which are subsequently mixed with the ground product whose particle size is less than 74 x 10 ^ in the volume ratio of 5: 100.

Ved xerografisk kopiering vil tonerfelterne hæves 0,05 mm og stâ meget skarpe mod omgivelserne. De tilsatte farve-30 stoffer farver mikrokuglerne noget under opskumningen og ager skarpheden.With xerographic copy, the toner fields will be raised 0.05 mm and will be very sharp against the surroundings. The added dyes add some color to the microspheres during foaming and act sharp.

De opskummelige tonere ifalge eksemplerne 1-9 er meget sta-The foamable toner according to Examples 1-9 is very solid.

DK 157216BDK 157216B

- 6 - bile. Den i eksempel 3 nævnte toner har sâledes været i 8 timers dagligbrug i en xerografisk kopieringsmaskine over en période pâ 6 mâneder. Tonerbeholderen blev naturligvis efterfyldt i lobet af den nævnte période. De fremstillede 5 kopier var aile tilfredsstillende.- 6 - cars. Thus, the tones mentioned in Example 3 have been for 8 hours of daily use in a xerographic copy machine over a period of 6 months. The toner container was of course replenished during the said period. The 5 copies produced were all satisfactory.

De forvarmede eller foropskummede mikrokugler i henhold til eksempel 9, der i det væsentlige indeholder luft som er-statning for isobutan eller en anden gas, kan ogsâ benyttes i andre tonerblandinger.The preheated or pre-foamed microspheres of Example 9, which substantially contain air as a substitute for isobutane or another gas, may also be used in other toner mixtures.

10 Luftholdige mikrokugler kan benyttes i eksemplerne 1-6 entes som eneste mikrokuglebestanddel eller sammen med de opskummelige mikrokugler. Deres luftindhold er tilstrække-ligt til at bibringe tonerblandingen den onskede opskumme-lighed. Det er ogsâ muligt at benytte mikrokugler, der in-15 déholder en anden gas end luft eller isobutan. Eksempelvis kan nitrogenholdige kugler benyttes med tilfredsstillende résultat i eksemplerne 1-5 samt 8 og 9.Airborne microspheres can be used in Examples 1-6 as the sole microspheres component or together with the foamable microspheres. Their air content is sufficient to impart the desired toner to the toner mixture. It is also possible to use microspheres containing a gas other than air or isobutane. For example, nitrogen-containing balls can be used with satisfactory results in Examples 1-5 and 8 and 9.

Ved brug af tonerblandingerne ifolge den foreliggende op-20 findelse har der vist sig en overraskende heldig virkning, nemlig at det fotoledende lag pâ valsen i et xerografisk kopieringsanlæg beskyttes mod beskadigelser, der skyldes en nodvendig bestanddel i sædvanlige tonerblandinger. En sæd-vanlig toner indeholder en sâkaldt fremkalder, der bestâr 25 af glaskugler med en diameter pâ omkring 1,25 mm og over-trukket med harpiks, eksempelvis ifolge US-PS 2.618.551 en polyvinylbutyral plus phénolformaldehyd oploselig harpiks.Using the toner blends according to the present invention, a surprisingly successful effect has been found, namely that the photoconductive layer on the roller of a xerographic copying plant is protected from damage caused by a necessary component of conventional toner blends. A seminal toner contains a so-called developer consisting of glass beads about 1.25 mm in diameter and coated with resin, for example, according to U.S. Pat. No. 2,618,551, a polyvinylbutyral plus phenol formaldehyde soluble resin.

Denne "fremkalder" forbruges ikke ved kopieringsprocessen, men tjener alene som bæreorgan for fine ladede tonerpartik-30 1er. Nar tonerpartiklerne er bundet til de opladede partier pâ selenbelægningen pâ valsen, ruller de videre over belæg-ningen og renser de ikke opladede partier. Glaskuglerne kan herved ridse valsens belægning, men mâ tolereres, fordi de betinger gode xerografiske kopier. Tilsætningen af opskum-35 melige mikrokugler har vist sig at forhindre glaskuglerne iThis "developer" is not consumed by the copying process, but serves solely as a carrier for fine charged toner particles. When the toner particles are bonded to the charged portions of the selenium coating on the roller, they roll over the coating and clean the uncharged portions. The glass balls can thereby scratch the coating of the roller, but must be tolerated because they condition good xerographic copies. The addition of foamable microspheres has been shown to prevent the glass beads from

DK 157216 BDK 157216 B

- 7 - "fremkalderen" i at ridse selenbelægningen.- 7 - the "developer" in scratching the selenium coating.

Eksempel 10Example 10

Opskummelige mikrokugler 100 vol.dele olie-oploseligt sort farvestof 0,5 vol.dele i 100 vol.dele heptan 5 blev landet, torret pâ en plade ved stuetemperatur og formalet i en kuglemalle. De farvede mikrokugler blev be-nyttet direkte som toner i en xerografisk kopieringsmaski-ne. De farvede tonerfelter var hævet 0,25 mm og hæftede godt til kopipapiret·, fordi materialet vinylidenchlorida-10 crylonitril er termohæftende. Eftervarmning i en ovn ved 150°C medforte yderligere momentan opskumning efterfulgf af nogen nedsmeltning, der medforte yderligere vedhæftning til papiret.Foamable microspheres 100 parts oil-soluble black dye 0.5 parts in 100 parts heptane 5 were landed, dried on a plate at room temperature and ground in a ball template. The colored microspheres were used directly as toner in a xerographic copy machine. The colored toner boxes were raised 0.25 mm and adhered well to the copy paper · because the material vinylidene chloride-10 crylonitrile is thermo-adhesive. Reheating in an oven at 150 ° C caused further instantaneous foaming, followed by some melting, which caused further adhesion to the paper.

Eksempel 11 15 Opskummelige mikrokugler alene blev benyttet som toner i en xerografisk kopieringsmaskine. Resultatet af en kopierings-proces var farvelose haavede tonerfelter, hvis struktur kan sammenlignés med tæt o pakkede, gennemsigtige og hule balloner, der ved termohæftning er fastgjort til 20 kopipapiret og indbyrdes.Example 11 Foamable microspheres alone were used as toner in a xerographic copier. The result of a copying process was colorless shaded toner fields, the structure of which can be compared to tightly packed, transparent and hollow balloons, which are attached to the copy paper by thermal bonding and mutually.

Ved anvend'el'së af klar mularfilm (0,075 mm) som kopiark op-nâs gennemsigtige tonerfelter pâ en gennemsigtig baggrund, men de hævede tonerfelter kan erkendes densiometrisk eller ved hjælp af elektrooptiske organer eller benyttes i foto-25 grafiske processer.When using clear mullar film (0.075 mm) as a copy sheet, transparent toner fields are obtained on a transparent background, but the raised toner fields can be recognized densiometric or by electro-optic means or used in photographic processes.

Da det anvendte materiale vinylidenchloridacrylonitril er bestandigt i forhold til de oplosningsmidler, der benyttes i tryk- og stempelfarve, kan en spejlvendt kopi af den her nævnte art ôgsâ benyttes ved flexografisk trykning eller i 30 stedet for et sædvanligt kontorstempel.Since the material used vinylidene chloride acrylonitrile is resistant to the solvents used in printing and stamping, a mirrored copy of the kind mentioned herein may also be used for flexographic printing or instead of a conventional office stamp.

DK 157216BDK 157216B

- 8 -- 8 -

Eksempel 12Example 12

Til fremstilling af farvekopier anvendes en tonerblanding bestàende af opskummelige mikrokugler 100 vol.dele 5 heptan 100 vol.dele farvestof 1 vol.deleFor the preparation of color copies, a toner mixture consisting of foamable microspheres 100 parts by volume 5 heptane 100 parts by volume dye 1 parts by volume is used.

For hver farve terres tonerblandingen i luffc og pulverise-res til frit-strommende konsistens.For each color, the toner mixture is ground in luffc and powdered to free-flowing consistency.

Ved pâ hinanden felgende xerografiske kopieringer af origi-10 nalens forskellige f.arveseparationer pâ samme kopiark opnâs en kopi, hvor tonerfelternes hojde er udtryk for farvemæt-ningen, altsâ sâkaldt "Frost imaging", som beskrevet i Des-sauer and Clark, kapitel XIII, side 375. NÂr kopiarket er en gennemskinnelig mularfiliu, jf. eksempel 11, virker kopi-15 en som et farvefotografisk negativ, nâr det holdes op mod lyset.On consecutive xerographic copies of the original color separations of the original on the same copy sheet, a copy is obtained in which the color of the toner fields expresses the color saturation, so-called "Frost imaging", as described in Des-sauer and Clark, Chapter XIII , page 375. When the copy sheet is a translucent mular file, cf. Example 11, the copy 15 acts as a color photographic negative when held against the light.

Kopien med de i overensstemmelse med farvemætningen hævede tonerfelter kan varmpresses mod en glat plade. Hejderne af tonerfelterne omsættes da til farvemaetning med fordelagtig 20 sammensmeltning af grænserne mellem de enkelte farveseparationer.The copy of the toner fields raised in accordance with the color saturation can be hot pressed against a smooth plate. The heights of the toner fields are then converted to color saturation with advantageous fusion of the boundaries between the individual color separations.

Som presseplade kan benyttes en 0,03 mm halvhârd aluminiumsfolie, idet denne folie og kopiarket med tonerfelterne vendt mod folien ledes gennem en 25 varmekopieringsmaskine, eksempelvis 3M*s "Casual Copier”.A 0.03 mm semi-hard aluminum foil can be used as a press plate, as this foil and the copy sheet with the toner fields facing the foil are passed through a 25 heat copier, for example 3M * "Casual Copier".

Efter afkeling fjernes aluminiumsfolien og efterlader et plant farvebillede pâ arket.After cooling, the aluminum foil is removed leaving a flat color image on the sheet.

Eksempel 13Example 13

Ved brug i et xerografisk kopieringsanlaeg af en tonerbland-30 ing omfattende opskummelige mikrokugler 100 vol.dele bariumferrit {max.8Q masker/cm) 100 vol.dele sædvanlig toner 10 vol.dele - 9 -When used in a xerographic copying plant of a toner mixture comprising foamable microspheres 100 parts by volume of barium ferrite (max. 8Q masks / cm) 100 parts by volume of usual toner 10 parts by volume - 9 -

DK Î57216BDK Î57216B

opnâs tonerfelter, der er hævet 0,025 mm og magnetisk 10s-bare. Tonerfelterne kan ogsâ læses eller aftastes optisk, elektrisk eller mekanisk.toner fields are raised that are raised 0.025 mm and magnetic 10s bare. The toner fields can also be read or scanned optically, electrically or mechanically.

Eksempel 14 5 De tonerfelter, der opnâs ifolge eksempel 14, er som nævnt magnetiske, og de kan sâledes tiltrække blæk eller trykfar-ve bestâende af eksempelvis sort jernoxid FE3q4 - FeO 100 vol.dele termohaef tende binder (max.80 masker/cm 100 vol.dele 10 (eksempelvis sædvanlig tonerblanding)Example 14 The toner fields obtained in accordance with Example 14 are as mentioned magnetic and can thus attract inks or inks consisting of, for example, black iron oxide FE3q4 - FeO 100 vol parts thermoelectric binder (max. 80 masks / cm 100 Vol. 10 (e.g. conventional toner blend)

Claims

Method of xerographic preparation of relief images, characterized in that a toner, rice-resistant electroscopic and thermo-adhesive powder mixture, foamable by heat effect, or a conventional toner, is used as toner. a substance which is peelable by heat effect has been set and that the copy sheet, immediately after the toner has been applied, is subjected to a heat for fixing and foaming the toner,

Toner for use in the practice of the method 10. According to claim 1, comprising a terry, rice-resistant electroscopic whip and thermo-adhesive powder mixture, characterized in that the powder mixture requires a foam which is foamable by heat.

Toner according to claim 2, characterized by including hollow and gas-containing microspheres,

4- Toner according to claim 3, characterized in that the spheres are made of vinylidene chloride acrylonitrile copolymer having a diameter of 0.5 - 20 x 10 mm and that the gas contained is mainly isobutane.

Toner according to claim 4, characterized in that the diameter of the balls is 8 x 10 mm.

Toner according to claim 2, characterized by comprising one or more of the substances N, N'-dimethyl-N, N'-dinitrosophthalamide, azoisobutyrodinitrile and azodicarbonamide.

7. Toner according to claims 2-6, characterized by containing from 0.1 to 99.5 parts foamable material. DK 157216B - 11 -

8. Toner according to claim 7, characterized in that the content of microspheres is about 20 parts by volume.

Toner according to claim 3, characterized in that the microspheres are air-filled.

Toner according to claim 3, characterized in that the microspheres are nitrogen filled.

Toner according to claims 2-10, characterized by containing as one thermo adhesive one or more of the substances styrene resin and methacrylate ester copolymer, isoprene resin, polyeth-y-1-ene, phenol formaldehyde copolymer, butadiene polymer, melamine resin asphaltum and vinyl resin.