Dissolves Barry Thornton 2 bath developer help needed please.

<p>Dear friends,<br>

I want to dissolves the Barry Thornton 2 bath developer. I have a question regarding to how to dissolves the powders. <br>

I need to make 1 liter with Metol and Sodium Sulphite: Do I dissolves each powder and on time or the both of them together? What temperature the water (distiled) should be?<br>

Same for the part B: Sodium Metaborate- What temperature the water should be?</p>

<p>Thank you for sharing your knowledge,<br>

Niro.</p>

<br />

<p>For Part A, dissolve a little bit of sodium sulfite (1-2 grams) first, then the metol, then the rest of the sodium sulfite. Having your water pre-heated to 30-35C will help (but let it cool to room temperature before using it).</p>

<p>For Part B, the temperature doesn't really matter, as sodium metaborate is quite soluble.</p>

<p>It's a great developer -- good luck! </p>

<p>Just to expand on what Jordan has said: metol will never dissolve if all the sodium sulphite has been dissolved in the water first. But the metol is protected from oxidation if a very tiny bit of the sodium sulphite is dissolved first.</p>

<p>So start by dissolving a tiny bit of sodium sulphite, then dissolve the metol, then when it has ALL dissolved, add the rest of the sodium sulphite.</p>

<p>Thanks Jordan and John.<br>

Can you also help me with more questions:<br>

1. Do I need to agitate the part B bath when using 120 roll?<br>

2. Can you share your starting time for TRI-X400 and ACROS100 120 both at boxing speed (if you use them of course.)</p>

<p>Thank you again,<br>

Niro.</p>

<p>I haven't used it.<br>

There is some info at this web page:<br>

http://www.ephotozine.com/article/Using-two-bath-developers-4637</p>

<p>I've seen some comments at APUG that a little agitation in bath B is needed to maintain evenness.</p>

<p>See inforamtion at Barry's web site:</p>

<p><a href="http://www.awh-imaging.co.uk/barrythornton/2bath.htm">http://www.awh-imaging.co.uk/barrythornton/2bath.htm </a></p>

<p>Hi.<br>

I just tried to mix this developer and have solubility issues with both solutions.<br>

I mixed metaborate 10% solution as Anchell's recipe, 9.5g Lye + 45.4g Borax in 1L water.<br>

I mixed them last night and now there is a small amount of precipitate on the bottom of the container (PET bottle).<br>

I mixed them at 50C and stirred for about 30 mins. I did not use distilled water but normal tap water with which I usually mix all of my chems.<br>

Is this precipitate normal? Should I filter it?<br>

Anyone any idea?<br>

Thanks</p>