It does matter. I once saw a label where the printing colour would apparently soak in the water, so later the petroleum spirit could not go in and dissolve it.
Rene Charton ---------- | 寄件者: Ned Devine <[email protected]> | 收件者: [email protected] | 主旨: RE: RE: isopropyl alcohol | 日期: 1998年7月14日 PM 10:33 | | Hi, | | I don't think it would matter if you did the water first or the | petroleum spirit. | | Note: for petroleum spirit we use n-Hexane 95+%, not kerosene or gas. | | Ned Devine | Entela, Inc. | Program Manager III | | Toll Free: 1 800 888 3787 Ext. 671 | Direct: 1 616 248 9671 | Fax: 1 616 248 0591 | e-mail: [email protected] | | | | > ---------- | > From: Crabb, John[SMTP:[email protected]] | > Reply To: Crabb, John | > Sent: Tuesday, July 14, 1998 6:37 AM | > To: '[email protected]'; [email protected]; | > [email protected]; [email protected] | > Subject: RE: RE: isopropyl alcohol | > | > The requirements in 1.7.15 of UL 1950 are : - | > Compliance is checked by inspection and by rubbing the marking by hand | > for | > 15 s with a piece of cloth soaked with water and again for 15 s with a | > piece | > of cloth soaked with petroleum spirit. After this test, the marking | > shall be | > legible; it shall not be possible to remove marking plates easily and | > they | > shall show no curling. | > The petroleum spirit to be used for the test is aliphatic solvent | > hexane | > having a maximum aromatics content of 0.1% by volume, a kauri-butanol | > value | > of 29, an initial boiling point of approximately 65EC, a dry point of | > approximately 69EC and a mass per unit volume of approximately 0.7 | > kg/l. | > | > My recollection is that the sentence beginning "the petroleum spirit" | > was | > added to CLARIFY | > exactly what should be used. | > | > It has been suggested to me that doing the test EXACTLY as specified | > is less | > severe | > than just rubbing with petrol (gas to you). i.e. rubbing with water | > leaves a | > film of water, | > followed by rubbing with petrol. | > | > We use a UL Recognized Printing Materials system (PGJI2), where the | > combination of | > label stock, ink ribbon, and printer gives you a label which satisfies | > UL | > requirements. | > We use a system from Donprint, which also is CSA Certified, and we | > have | > NEVER had | > UL or CSA carry out any tests. | > | > As an aside, one of the advantages of buying UL 1950 on disc is that | > you | > could copy | > the above extract and insert it in an e-mail such as this, rather than | > typing it out. | > | > John Crabb, Product Safety | > NCR Financial Solutions Group Ltd, Dundee, Scotland. | >
