ASTM_F_1623_-_96_2013.pdf

Designation:F162396(Reapproved 2013)Standard Terminology Relating toThermal Imaging Products1This standard is issued under the fixed designation F1623;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Referenced Documents1.1 ASTM Standards:2F1405 Test Method for Determining the Dynamic ThermalResponse of Direct Thermal Imaging ProductsAtlantekMethodF1444 Test Method for Determining Dynamic Thermal Re-sponse of Direct Thermal Paper-Label Printer MethodF1445 Test Method for Determining Static Thermal Sensi-tivity of Direct Thermal Media2.Terminologyactivation temperaturetemperature which generates an op-tical density of 0.20.active coat,na coating layer which contains the primaryimage(color)forming ingredients.antioxidantsee stabilizer.antistata chemical additive,generally added to the back sideor printhead side of thermal products,which enhances theconductivity of the coating,allowing static electric chargesto be bled off during the production processes or during theoperation of the product in a machine.background,na measure of the reflectance or density of theunimaged portion of a thermal paper;typically measuredusing a densitometer,reflectometer,or opacimeter.basecoat,na coating applied to a base substrate to produce alevel surface for the application of the active coat;may alsofunction to improve the heat/energy transfer of the activecoat layer.binder,na material employed to bind the image-formingmaterials to the substrate.DISCUSSIONCommonly employed materials include polyvinylacetate,polyvinyl alcohol,starch,and styrene butadiene polymerdispersions.color formersee leuco dye.core,na paper,plastic,or fiber core upon which the thermalproduct is wound.developer,nacidic materials which react with leuco dyes toform color.DISCUSSIONTypical developers include Bisphenol A,TGSA,D8,and benzyl paraben.direct thermal imaging productpaper,film,or other sub-strate upon which a coating is applied;the imaging compo-nents consist of a color former,a developer,a sensitizer andantioxidants which react to form an image when heated froma thermal printhead.direct thermal paper,npaper coated with a heat-reactivecoating,which changes from a colorless form to an intensecolored state upon contact with a thermal printhead.direct thermal product,nsubstrate coated with a heat-sensitive formulation for the purpose of creating an imagewhen heat is applied from a thermal printhead.D2T2,nabbreviation for dye diffusion thermal transfer.dye sublimination,nan imaging process from thermal dyeribbons,which employ selected organic dyes,and havecharacteristics different from an imaging process usingpigmented materials employed in thermal transfer waxribbons.dynamic thermal response curve,ngraphical representa-tion of the response characteristic of a thermal printingsystem over a given range of print energies;the y-axis isoptical density and the x-axis is print energy(watts/dot ormillijoules)orenergydensity(millijoules/squaremillimetres).(F1444,F05)environmental resistance,na measure of a direct thermalproducts ability to resist the effects of exposure to environ-mental contaminants on either the imaged or unimagedareas.DISCUSSIONTypical contaminants may include water,oils,alcohol,light,or heat/humidity.1This terminology is under the jurisdiction of ASTM Committee F05 onBusiness Imaging Products and is the direct responsibility of Subcommittee F05.01on Nomenclature and Definitions.Current edition approved April 1,2013.Published April 2013.Originallyapproved in 1995.Last previous edition approved in 2008 as F1623 96(2008).DOI:10.1520/F1623-96R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 image density,na measure of the reflectance or density ofthe imaged portion of a thermal imaging product afterexposure to heat energy;typically measured with adensitometer,reflectometer,or opacimeter.initial temperatureSee activation temperature.ink layer(1)the components of the image coating used inthermal transfer products which contain waxes,resins,pigments and other materials deposited or coated onto asubstrate;(2)the layer of thermally sensitive material whichis transferred during the thermal transfer printing process.ion content,na measure of the free sodium,potassium,andchloride content in a direct thermal or thermal transferproduct;trace amounts may cause chemical attack to thethermal printhead elements.leuco dye,ncolor precursors,examples of which are triph-enyl methane and fluoran classes which react with a devel-oper