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<div class="moz-cite-prefix">On 23. 4. 2013 17:54, Radovan Augustin
wrote:<br>
<br>
Ktovie, co sa rozumie tym "ink printed with polyester 100-40 per
cm". Zeby sietotlac cez sito 100T az 40T? Tym by sme sa ale
oblukom dostali naspat o 11 dni:
<a class="moz-txt-link-freetext" href="http://list.hw.cz/pipermail/hw-list/2013-April/438584.html">http://list.hw.cz/pipermail/hw-list/2013-April/438584.html</a>
("Odpovedou je sietotlac s pripravenym motivom.")<br>
<br>
Bohuzial, ten prvy typ - PIM - sa zatial v malom na ebay a pod.
nepredava, resp. som ho nenasiel. Da sa kupit kilo trebars u
britrade, ale co s tym. Ono sa to tym teplom nevytvrdzuje, iba
susi. Potom sa exponuje relativne malou energiou, vyvola sa, a na
zaver sa teplom alebo UV (velkou energiou) finalne vytvrdzuje.
Podobne ako suchy film, len ho najprv treba naniest a ususit.<br>
<br>
To cinske, co vsetci patlaju, je IMO ten druhy typ, a aspon ten
moj je takej blbej konzistencie, ze sa pri sietotlaci zlieva. Asi
je urceny na opravy vyskriabanej masky v servisoch alebo tak, kde
sa davkuje na poskodene miesta ihlou a dispenzerom. Balenie by to
naznacovalo.<br>
<br>
Mam taky divny pocit deja dit...<br>
<br>
Co sa tyka rovnomerneho nanasania, tak cez neovrstvene sito to ide
super - za 3 minuty je hotovo, vratane cistenia sita trochou
riedidla a par papierovych kapesnikov
<a class="moz-txt-link-freetext" href="http://static.bastl.sk/hwl/st/st008.jpg">http://static.bastl.sk/hwl/st/st008.jpg</a> .<br>
<br>
Akurat ze v tom mojom sajrajte sa oddeluje zelene od priesvitneho
(pekne vidiet na detaile <a class="moz-txt-link-freetext" href="http://static.bastl.sk/hwl/st/st009.jpg">http://static.bastl.sk/hwl/st/st009.jpg</a>),
takze vysledok vyzera trochu flakato. Hodit to za psom... a snad
ani to nie.<br>
<br>
-m-<br>
<br>
</div>
<blockquote
cite="mid:1366732461.89542.YahooMailNeo@web161706.mail.bf1.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff; font-family:times
new roman, new york, times, serif;font-size:12pt">
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 12pt;">Dobry den,</div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 12pt;"><br>
</div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 16px; color: rgb(0, 0, 0); background-color:
transparent; font-style: normal;">po hledani na internetu jsem
zjistil jak to je. Existuji dva hlavni typy solder mask:</div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 16px; color: rgb(0, 0, 0); background-color:
transparent; font-style: normal;">1. Aqueous developable
photo-imagable solder mask</div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 16px; color: rgb(0, 0, 0); background-color:
transparent; font-style: normal;">2. UV curable solder mask</div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 16px; color: rgb(0, 0, 0); background-color:
transparent; font-style: normal;"><br>
</div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 16px; color: rgb(0, 0, 0); background-color:
transparent; font-style: normal;">Typ 1.</div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 16px; color: rgb(0, 0, 0); background-color:
transparent; font-style: normal;">Nanese se na DPS, vytvrzuje
se teplotou v troube a potom se pres folii se vzorem osviti UV
svetlem.</div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 16px; color: rgb(0, 0, 0); background-color:
transparent; font-style: normal;"><br>
</div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 16px; color: rgb(0, 0, 0); background-color:
transparent; font-style: normal;">Typ 2.</div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 16px; color: rgb(0, 0, 0); background-color:
transparent; font-style: normal;">nanese se na DPS a pres
folii se vzorem se vytvrdi UV svetlem. Na internetu jsem nasel
m<span style="background-color: transparent;">anual k nejake
UV curable solder mask a v nem se pise:</span></div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 16px; color: rgb(0, 0, 0); background-color:
transparent; font-style: normal;"><span
style="background-color: transparent;"><br>
</span></div>
<div style="background-color: transparent;"><span
style="background-color: transparent;">
<div style="background-color: transparent;">CURING</div>
<div style="background-color: transparent;">Using UV dryers
equipped with 3 x 200 watts per inch metal halide or
mercury vapour lamps, ink printed with</div>
<div style="background-color: transparent;">polyester 100-40
per cm, curing is achieved at about 4.5 to 5 metres per
min. or the energy required to cure is</div>
<div style="background-color: transparent;">about 1800
millijoules using UV Integrator Model UV or about 3200 –
3500 millijoules on UVA spectral</div>
<div style="background-color: transparent;">response.</div>
<div style="background-color: transparent;">In case of
over-printing on UV Solder Resists, it is advisable to
under cure the solder resists (7-8m) or about 1200</div>
<div style="background-color: transparent;">millijoules to
get better inter-coat adhesion. The complete curing of
Solder Resist will take place at the same time</div>
<div style="background-color: transparent;">when curing the
marking ink. Avoid over-curing that could make the ink
film brittle.</div>
</span></div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 16px; color: rgb(0, 0, 0); background-color:
transparent; font-style: normal;"><span
style="background-color: transparent;"><br>
</span></div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 16px; color: rgb(0, 0, 0); background-color:
transparent; font-style: normal;"><br>
</div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 16px; color: rgb(0, 0, 0); background-color:
transparent; font-style: normal;"><span
style="background-color: transparent;">Radovan Augustin</span><br>
</div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 16px; color: rgb(0, 0, 0); background-color:
transparent; font-style: normal;"><br>
</div>
<div style="background-color: transparent;">
<div style="background-color: transparent;"><br>
</div>
</div>
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 12pt;">
<div style="font-family: 'times new roman', 'new york', times,
serif; font-size: 12pt;">
<div dir="ltr">
<hr size="1"> <font size="2" face="Arial"> <b><span
style="font-weight:bold;">From:</span></b> Petr
Labaj <a class="moz-txt-link-rfc2396E" href="mailto:labaj@volny.cz"><labaj@volny.cz></a><br>
<b><span style="font-weight: bold;">To:</span></b>
HW-news <a class="moz-txt-link-rfc2396E" href="mailto:hw-list@list.hw.cz"><hw-list@list.hw.cz></a> <br>
<b><span style="font-weight: bold;">Sent:</span></b>
Tuesday, April 23, 2013 2:09 PM<br>
<b><span style="font-weight: bold;">Subject:</span></b>
Re: Nepajiva maska - zkusenosti<br>
</font> </div>
<div class="y_msg_container"><br>
Moc to nevidim jako funkcni. Ale treba jen ten Vas postup
spatne chapu.<br>
<br>
Pokud byste to chtel zarovnat skrabkou posle tech
nalepenych "kolejnic",<br>
tak byste musel mit absolutne v rovine povrch toho
tistaku. Takze snad tehdy,<br>
pokud byste treba pouzil vakuovy pritlak. Jen u jen volne
polozeneho tistaku<br>
bude urcite povrch trochu prohnuty (hrajeme si na
mikrony).<br>
<br>
A jak na to budete exponovat motiv? To, co popisujete, by
mohlo fungovat<br>
pri LDI (prime kresleni motivu laserem). Ale pokud
pouzijete beznou expozici<br>
pres sablonu, tak na to tu sablonu musite nejak polozit.
No a kdyz uz ji tam<br>
budete pokladat, tak Vam tu vrstvu masky muze srovnat ona
(tak to pouzivam<br>
ja, a zrejme i mnoho ostatnich).<br>
<br>
O jake mesce uvazujete? Pokud o tech v "kyblicich" 100g,
co na ni tady sly<br>
odkazy (modra, zelena, cerna, bila) a od ktere kazdeho
zrazuji, tak na tu<br>
teplota nijak neucinkuje. Ona se nevytvrdi, spis naopak je
jeste tekutejsi.<br>
A pokud by to byla ona, tak na osvit 10 minut nejakym
svetlem na nehty zrejme<br>
muzete zapomenout, potrebuje to chce mnohem vetsi davku
(tedy ja tvrdim, ze<br>
nejlepe davku z Kalasnikova, ale nechci byt
nekonstruktivni). U toho svetla<br>
na nehty by to chtelo zjistit spektrum, delsi vlny (kolem
400nm) funguji jeste<br>
hur nez kratsi (kolem 365nm), a to i ty kratke trvaji u
teto pasty dlouho.<br>
<br>
PL<br>
<br>
************************************<br>
<br>
From: Radovan Augustin <br>
To: hw-list <br>
Sent: Tuesday, April 23, 2013 9:14 AM<br>
Subject: RE: Nepajiva maska - zkusenosti<br>
<br>
Dobry den,<br>
nepajiva maska modre barvy odrazi modrou barvu, proto je
modra, ucinnost UV svetla bude asi velmi slaba.<br>
<br>
Mam vymyslenej tenhle postup, ktery se chystam v nejblizsi
dobe vyzkouset:<br>
<br>
Pri vyrobe CU motivu na DPS se necha na dvou stranach pas
CU siroky asi 1cm. Po dokonceni DPS se odstrihne.<br>
Na tenhle pas na kraji DPS se nalepi CU pasek, napr. <a
moz-do-not-send="true"
href="http://www.gme.cz/vodive-pasky/cu-paska-dps-p661-096/"
target="_blank">http://www.gme.cz/vodive-pasky/cu-paska-dps-p661-096/</a><br>
CU pasek od Elchemca prodavany v GME ma tloustku s
lepidlem 70um.<br>
<br>
Potom se nepajiva maska nanese obycejnou sterkou, napr.<br>
<a moz-do-not-send="true"
href="http://www.domacitechnika.cz/levne-jobi-sterka-japan-4ks-nerez-sterka-japan-4ks-nerezCU"
target="_blank">http://www.domacitechnika.cz/levne-jobi-sterka-japan-4ks-nerez-sterka-japan-4ks-nerezCU
</a>pasek po stranach DPS zapezpeci tloustku nanesene
nepajive masky asi 70um nad medi. Deska s nanesenou pastou
se da do pece na 15 minut pri teplote 90 stupnu.Potom se
osviti UV svetlem asi deset minut. Mohou se pouzit UV
zarivky z profesionalni UV lampy,
napr.http://aukro.cz/profesjonalni-uv-lampa-36w-na-vytvrzovani-gelu-b-i3172489173.htmlNepajiva
maska je UV curable, to znamena ze po osvitu se redidlem
smyje nepajiva maska ktera nebyla osvicena UV
svetlem.Radovan Augustin<br>
<br>
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