Most people agree that 10lpm at standard oxycon pressures is not enough for a Lynx. That torch can handle 10lpm at 15PSI and most oxycons make around 5PSI. So, you may be operating around 33% of that torch's capacity. That might be the reason colors are reducing; your oxygen is just not enough for the propane/torch combo as is.
Add more oxycons or turn down your propane pressure. I've heard 3:1 oxy to propane is good but that's tough when the oxycon only makes 5PSI; that means propane should be just under 2PSI. At lower pressures, the flame chemistry may improve but at the cost of power.
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