diff --git a/Readme.md b/Readme.md
index 20f8f48..1fa259f 100644
--- a/Readme.md
+++ b/Readme.md
@@ -149,7 +149,7 @@ Plotted to 'gerbers/Flow_Controller_Panel-B_Mask.gbs'.
 ```
 ### 4. Exposure
 
-We need to **invert all** layers: `F.Cu,B.Cu,F.Mask,B.Mask,F.SilkS,B.SilkS`.
+We need to **invert copper and soldermask** layers: `F.Cu,B.Cu,F.Mask,B.Mask,F.SilkS,B.SilkS`.
 
 We need to **mirror all front** layers: `F.Cu,F.Mask,F.SilkS`.
 
@@ -157,7 +157,10 @@ Traces should appear black on white background.
 - background = UV exposed = resist removed = etched away
 - traces = dark = resist kept = copper stays
 
-Start with `--exposure 60` and bracket from there — Bungard presensitized at 405nm typically lands between 30–120s depending on board vintage and storage.
+Start with `--exposure 60` and bracket from there — **Bungard** presensitized at 405nm typically lands between 30–180s depending on board vintage and storage.
+
+UV light curing Solder Mask from **Mechanic** needs 15 minutes when prebaked (heat it to 80C for 15 minutes) otherwise 30 minutes. Use green as the solder mask and white for the silkscreen.
+
 
 #### 4.1. Export print files for copper layers
 
@@ -167,34 +170,34 @@ pcb-expose.sh Dummy.pm4n gerbers/Flow_Controller_Panel-Front.gtl \
     --invert --mirror --exposure 120 \
     --output pm4n/Flow_Controller_Panel-Front.pm4n
 
-pcb-expose.sh Dummy.pm4n gerbers/Flow_Controller_Panel-Back.gtl \
+pcb-expose.sh Dummy.pm4n gerbers/Flow_Controller_Panel-Back.gbl \
     --invert --exposure 120 \
     --output pm4n/Flow_Controller_Panel-Back.pm4n
 ```
 
 #### 4.2. Export print files for soldermask layers
 
-Export the front and back **soldermask** layers for 300 seconds exposure
+Export the front and back **soldermask** layers for 900 seconds exposure
 ```bash
-pcb-expose.sh Dummy.pm4n gerbers/Flow_Controller_Panel-F_Mask.gtl \
-    --invert  --mirror --exposure 300 \
+pcb-expose.sh Dummy.pm4n gerbers/Flow_Controller_Panel-F_Mask.gts \
+    --invert  --mirror --exposure 900 \
     --output pm4n/Flow_Controller_Panel-F_Mask.pm4n
     
-pcb-expose.sh Dummy.pm4n gerbers/Flow_Controller_Panel-B_Mask.gtl \
-    --invert --exposure 300 \
+pcb-expose.sh Dummy.pm4n gerbers/Flow_Controller_Panel-B_Mask.gbs \
+    --invert --exposure 900 \
     --output pm4n/Flow_Controller_Panel-B_Mask.pm4n
 ```
 
 #### 4.1. Export print files for silkscreen layers
 
-Export the front and back **silkscreen** layers for 300 seconds exposure
+Export the front and back **silkscreen** layers for 900 seconds exposure
 ```bash
-pcb-expose.sh Dummy.pm4n gerbers/Flow_Controller_Panel-F_Silkscreen.gtl \
-    --invert  --mirror --exposure 300 \
+pcb-expose.sh Dummy.pm4n gerbers/Flow_Controller_Panel-F_Silkscreen.gto \
+    --mirror --exposure 900 \
     --output pm4n/Flow_Controller_Panel-F_Silkscreen.pm4n
     
-pcb-expose.sh Dummy.pm4n gerbers/Flow_Controller_Panel-B_Silkscreen.gtl \
-    --invert --exposure 300 \
+pcb-expose.sh Dummy.pm4n gerbers/Flow_Controller_Panel-B_Silkscreen.gbo \
+    --exposure 900 \
     --output pm4n/Flow_Controller_Panel-B_Silkscreen.pm4n
 ```