Evidence of the ability to:
set up for THREE complex coating operations (one spot coating, one overall coating and one fine detail, using three different coatings of which one must be metallic, and include at least one in-line process), including:
setting up rollers and reel or sheet systems for coating a range of carbon, carbonless, latex, wax, resin and metallic coatings, aqueous and UV varnishes and machine varnishes
conduct a proof run and adjusting settings to ensure production speeds are attained
find and use information relevant to the task from a variety of information sources.
Note: If a specific volume or frequency is not stated, then evidence must be provided at least once.
To complete the unit requirements safely and effectively, the individual must:
describe key information on the work ticket listing type of coating required
describe what to do if vital information is missing from the job ticket
list checks to do prior to set up (availability of materials etc.)
describe how to choose the coating side of material
describe the effect of offside lay selection on the job
explain how to carry out a register check
For reel systems only
describe the effect of:
low web tension on the print
inefficient web splices
explain how to:
determine reel position for the job
check for a web break
identify safety risks associated with rewind of the machine
outline the effect of excessive web tension at rewind of the machine
For sheet systems only
explain how to:
determine sheet position for the job
select appropriate front lays
check a missing or late sheet
explain use of a two-sheet cut out on most feeders (sheet)
describe the effect of:
not enough coating on a sheet
excessive temperature on the sheet
describe the effect too much vacuum on the slow-down wheels has on the job
describe how to determine position of register or bustle wheels
describe the effect excessive jogging has on the stack
identify major WHS concerns when setting up the sheet or reel transportation system
identify WHS concerns relevant to the use of coatings
list types of coatings and their applications
explain suitability of the coating for the job
explain how the coat adheres to the product
identify the amount of coating required
describe the range of viscosities to run with on an aqueous coating
describe the effect of incorrect viscosity on coating
explain how to adjust viscosity of a coating
describe methods to solidify coating
explain drying UV coating
describe the printing principle being utilised to apply aqueous coating
explain why gluing tabs are not coated
identify the temperature the drier is set at to dry aqueous coating
explain when to use different image carriers (plate or blanket)
outline the effect skeleton wheels can have on the coating surface
describe how to measure the amount of gloss on the surface
outline organisational responsibility for the final approval on the job
describe the effect in the following scenarios:
UV coating on a wet print
viscosity is too high or too low
ink coverage is excessive, i.e. over 250%
identify key types of information in, and the location of, machine manuals, safety and other documentation relevant to this task.