- SAP "self-adhesive" security machins must be extracted from bundles or kiloware lots ... only heptane will remove them successfully from paper. neither water immersion nor philatelic hinge and gum removers have proven effective with 2009+ security cut machins... … from the machin forum this removal solution. I include a chemical analysis ... a.k.a. rubber cement thinner. ... used by commercial artists - no paper wrinkles on album pages
removal from paper : methodology1. removal : the adhesives can be successfully removed from paper using heptane* ... depending on the quantity of objects, this process will take 5mins to 1 hour or more... so setup as follows.... a basin of size is filled with heptane, and the stamps are saturated. after 5 mins, start removal from paper - and place face down on a glass sheet. wait 5 mins for excess heptane to evaporate , soon the stamps will become tacky ...2. replacement of adhesives : the glue will adhere to clear acetate but not vinyl sheets. as stock pages, I use binder photo album pages... the boards are covered by acetate sheets on 2 sides... within, I place a prepared 5x8 printed grid formed with StampCat9 reports. this acts a guide for placement of objects. the benefit, is the inserts can be varied - black sheet for scanning. the grid margins allow for inspection notes... I group by value and phosphor type ...3. alternately, I have used stockcard covers (clear acetate). this allows reconstruction of the various booklets as the matrices are sourced (T12, S6...) adhesives peel from acetate easily. album samples can be placed within stamp mounts, or first on cut-to-size clear acetate sheeting. stamp hinges do not adhere to vinyl, or acetate ... rubber cement is universal ...
- buy the 500ml can
- Water-activated machins : separate no-cancel machins on piece first from the kiloware ... though scarce, these can be separated from paper using UHU PRINZ hinge remover solution, applied to reverse side ... the stamps can soon be lifted from paper and placed within a "magic drying book" with vinyl and blotter pages... this method preserves gum and full phosphor
- the remaining used state machins can be separated best in a running water bath, with a overfllow topscreen ... the outflow eliminates transfer of soluable gum ( pvc or self-adhesive) and possible phosphor transfer to other machins ... place to dry in a "magic drying book" .... then, sort by face-value, prior to phosphor examination ..
- there has been some question aired about loss of phosphor level and transfer of glue and phosphor to other machins during paper separation ....most used state stocks in dealer or collector hands have gone thru some water-immersion process ... some of these may demonstrate stronger or weaker phosphor reaction under inspection... but relative to modern printing methods, variations occur in phosphor application or absence thereof ... so classification of variant machins requires a list of all known possibilities as well as judgemental analysis of state of a machin's phosphor level ... even unused machins go thru this inspection ...
- on average only 3-5 % of all postally used machins are collectable ... heavy cancel examples ... these I discard as uncollectable ... don't waste your time ... build a quality collection !