Support our Sponsors, they keep FADU free:   AG Photographic   Keyphoto   The Imaging Warehouse   Process Supplies   RH Designs   RK Photo   Second-hand Darkroom Supplies   Silverprint Ltd

Notices

Go Back   Film and Darkroom User > Equipment > Darkroom

  ***   Click here for the FADU 2015/2014 Yearbooks   ***

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 11th November 2012, 04:54 PM
Martin Aislabie's Avatar
Martin Aislabie Martin Aislabie is offline
Friend
 
Join Date: Nov 2008
Location: Stratford-upon-Avon, England
Posts: 1,655
Default

Quote:
Originally Posted by dsallen View Post
Hi there,

the width of the slots is not critical.
Don't totally agree

The width of the slot is a significant characteristic

The narrower the better - provided you can manage a nice rough surface texture on the opposing wall.

What you need to do is achieve turbulent (as opposed to laminar) flow over the entire surface of the print.

That way, you bring fresh clean water into contact with the entire surface of the print and so maximise the chemical gradient between the fixer saturated print and the clean water.

There are practical limits to how narrow the slots can be - as you may need to get your fingers in there to retrieve a print.

It also helps if the partitions slide out from the washer completely - when a print attaches itself to one of the walls it can be surprisingly difficult to dislodge without removing the entire thing from the tank and peeling the print away.

NOVA use a surface called "Crushed Ice" to achieve the turbulent flow

If you can only get hold of smooth sheets of plastic then small dabs of smooth headed Araldite every 1cm will do a reasonable job of acting as turbulators.

Martin
Reply With Quote
  #12  
Old 12th November 2012, 07:40 AM
Stocky Stocky is offline
Friend
 
Join Date: Oct 2010
Location: Melbourne, Australia
Posts: 177
Default

I agree strongly with the comments about a non-smooth surface to the slots. My Summitek washer came with smooth dividers. It was ok when lowering 8x10 prints on a single Nova clip, but when I did 12x16 prints with two clips it became very difficult to guide the print into the slot. I purchased textured dividers and it made a huge difference.

Also, I'm sure it assists in ensuring even washing on both sides of the paper because it breaks the "vacuum" which can exist when two large flat surfaces are together (paper + divider).
Reply With Quote
Reply

Tags
paper, slottie, washer
Support our Sponsors, they keep FADU free:   AG Photographic   Keyphoto   The Imaging Warehouse   Process Supplies   RH Designs   RK Photo   Second-hand Darkroom Supplies   Silverprint Ltd

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
JOBO processor, keep breaking the red washers cesare Darkroom 3 7th October 2012 01:59 PM
Paper Washers. Keith Tapscott. Darkroom 26 15th September 2009 05:53 PM


All times are GMT. The time now is 04:47 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.