a Simple Blanket to Plate Question......???

Could anybody tell me that about the Blanket to plate strip in mm of
small offset presses (A3 or GTO) that we should maintain.....

most of the time all are talking about bearer to bearer pressure setting
with pressure gauges....but we don't have that privilege in
non bearer to bearer machines like Hamada, Gestetner....Adast...etc...

So, I would be grateful to you if any of you could tell me some rough
idea about that......if impossible just let me know at least about the
Heidelberg's Blanket to Plate strip width when properly set the bearer to bearer pressure according to the Heidelberg Manual......


Awaiting for you inputs.

Thanks

demel

 

the ideal pressur is: 0,1mm plate -blanket and same for blanket-paper!

 

Dear roland 202 suisse,


Thanks for your quick respond....
But I am trying to get an answer related to ink strip method
because we don't have expensive pressure gauges to try off.....

what i am referring is just like Rislan to Form roller strip....
i think for most of the Heidelberg that setting is around 3mm-4mm....

so if i set my Blanket to Plate Stripe around 5.0 mm is too high...
That is what I wanted to clarify......

so i would be much grateful to you if you could kindly
tell me the approximate width of the strip so that we can visually
inspect and adjust accordingly......

Thanks

 

contact the ERACOM in zwitzerland is a scool for offset printer !

 

Dear roland 202 suisse,


Why you are trying me to enroll to that school....
is that school running out of student......:-((

dont you have any practical answer to my question rather than
saying impractical solution......

why do i go behind them when this lovely colorprintingforum
is present in my fingertips.....

i think you have gone to a wrong printing school that's why
you are saying that the strip should be 0.1mm that is 10th of a
millimeter......not even 1.0 mm....how can it be sir.....
so sorry to hear these type of answers from this exclusive forum......

if you don't know something please be genuine to say i don't know that sir....
that is how i learned from my Montessori education...... :-(((((((


Thanks

 

in french is not a problem for me too give the solution! but in englisch y can not! in the eracom you can find somone for give the solution in englisch! sorry, is just for help you !

 

Dear roland 202 suisse,

So sorry for the misunderstanding and appreciate your effort to solve my problem.

Don't let the language barrier to stop your communication.
just type it in your language(french or whatever) and use Google Translate
to translate it to English or whatever you want.

with this way you can communicate with most of the countries in their
native languages.....

this doesn't mean i am waiting for your answer in that way.
only a suggestion for your future use...))))


Thanks

 

ok! tu imprime sans eau avec du noir mélangé avec de la pâte pour que l'encre soit fluide et que les feuilles ne colle pas au blanchet, au plus grand format, un bel aplat noir ! si tu enlève 0,1mm de pression, ta feuille est imprimée très irrégulière! si tu contrôle de la même manière la pression entre plaque et blanchet n'oublie pas de mettre plus de pression au cylindre de pression!
si tu as un densitomètre et que tu peux contrôler l'engraissement du point de tramme, tu dois avoir aux maximum 15%; si c'est moins c' est encore mieux!
j'espère que tu comprends ce que je t'explique, et que c'était les informations que tu avais besoin !
salutations! et au plaisir!!!!!!!

 

Chers 202 roland suisse,

Merci beaucoup pour vous l'attribution de votre temps précieux
pour résoudre mon problème ...

Oui, je peux comprendre ce que vous dites. mais comment puis-je savoir
ce n'est plus de la pression ou sous la pression en fonction de votre méthode exactement.

C'est pourquoi je demande un strip Roller méthode à appliquer pour ce faire.
vous avez la moindre idée sur la largeur de la strip de pour Plate de Blanket
quand on veut régler un non porteur au porteur machine ..

l'idée que vous avez dit à mélanger avec la pâte d'encre semble être une bonne astuce.
pouvez-vous me faire savoir le ratio de pâte à l'encre dans les parties que je mélange avec
afin de vérifier ce paramètre ......

Merci





Dear roland 202 suisse,

Thanks you so much for allocating your valuable time
to solve my problem...

yes i can understand what you are telling. but how do i know
this is over pressure or under pressure according to your method exactly.

That's why i am asking for a Roller strip method to apply for this.
do you have any idea about the width of the stripe of blanket to Plate
when we want to adjust a non bearer to bearer machine..

the idea that you told to mix ink with dough seems to be a good tip.
can you let me know the Ink to Dough ratio in parts that i should mix with
in order to check this setting......

Thanks

 

salut! pour la pâte environ 20% ! c'est seulement pour que la feuille ne colle pas. donne moi ton e-mail comme ça je peux je te transmettre une photo d'une feuille imprimée sans pression, depuis ce résultat il faut ajouter 0.1 mm pour avoir une bonne pression
on m'a dit qu' il existe un calcul en relation avec le diamètre des cylindres pour définir la largeur de la bande de pression selon ta méthode.
je vais me renseigner et je te tiendrai au courant!
salutations!!!!

 

Salut Cher Suise

de nouveau merci bien pour le conseil ur...
est la Pâte essentielle de vérifier ce cadre...
si je vérifie il seulement avec l'encre ... est cela bien

Je vais vous MP mon email, alors vous pouvez me faire parvenir un échantillon.


Merci de nouveau tellement

 

8to9 mm strip

 

3/16 of an inch should be fine. Don't over think it, Just make it even across the cylinder.

 

Hi,
I set ink strip between plate and blanket to 2mm however, non bearer to bearer machines(like our ab-dick360) are not very consistent about pressure so, depending on the results and/or needs, i set it up to 4mm(but this WILL cause premature plate wear, say 20 to 30k impression)
What roland 202 is suggesting(0,1mm pressure between) is correct, but it's just not about the width of an ink stripe, is about total pressure contact between two cylinders. The only way i know to measure this is with a bearer to bearer pressure machine and a op manual or a gauge. I guess you could try to measure that in your press but i feel it would not make any sense becuse of the lack of controlled pressure.

Hope that helps
Moe

 

My sugestion

Hi from brasil, sorry about my english. ;(

Lokke i have a multilith 1250w, and i run 4 color´s on him

my plate to blanket film strip are 4mm. but i buy a new cylinder and reduce for 3mm.

tanks

 

Dear Tahir khan,tstruth ,m_alatorre, Marco Cobucci,

Thank you so much bothers for your valued responses.....
actually, i never thought this question would be answered....)))
anyway there are so many guys who love to be shared their knowledge with others..........

at the same time i must tell you that i had a dispute with roland 202 suisse
due to some language problem and misunderstanding about our communication....


But, Now i am so happy to tell you that he has become a good online friend
of mine........we are sharing our personal family photos also....
he's helping me every possible way of he can to over come some sort of problems...
see how wonderful this forum is.......

I love you.....i love you so much Colorprinting Forum.......Keep this up forever...


that's enough.......back to topic.......
after studying your responses i could come to a conclusion that
Blanket to Plate strip would be 3.5mm to 5.0mm is safe......

but dear Tahir khan you suggest 8-9mm.....can you please tell me to which machines
you suggested this much.......is it for Heidelberg machines....


Once again Thank you sooooooooo much friends......

demel

 

hi, 5mm is not safe. ok run only in severeral case.

 

Hi Marco Cobucci,


Thank you so much for your reply....
Yes you are correct......now i am having image doubling
problem when i set to 5mm....so i'll give it try for 4mm...

Dear Marco could you please tell me do i have to follow the same
value to blanket to impression......or should it be little higher value than blanket to plate.

awaiting for your reply...

Thanks

demel

 

you are well come

 

Dear roland 202 suisse,

These are real people with real printing problems. If you do not posess the knowledge to respond to them in an intelligent manner, then you have no business responding! We sugest that you listen and learn instead.

Demel,

On bearer to bearer presses we allow no more than a .005 squeeze between the plate and blanket. On a press such as yours,which I asume is spring loaded, You should try to produce a nice even 1.5 mil. stripe. If your stripe is not even, then put on a new blanket and try it again. Once you have this set,leave it alone. You should never have to really adjust this. Perhaps you should have your mechanic come in and set it for you? After he has set it,never touch it.

Lildaddy (30 yrs. exp.)