I never seem to get swords right

How do you do the transition from pure white to dark? I never seem to keep the pure white or the darkest color. Or my transition isnt' smooth
its just thin paint, a hair dryer and colours that work well together, if i tried to get that transition from black to white id struggle, but once i found colours that am comfortable with that work well together it gets much easier
Hi everyone!
it been a very long time since i last posted, iv been quite busy with lots of different things so sorry to anyone who was lookin forward to some progress, hopefully the next few bits and pieces will help make it up
Iv actually been quite busy painting wise over the last few months, iv got involved with my local GW to help increase the standard of painting their, which means ill be teachin intermediate classes to staff and jo public alike in feb, it also means iv been supporting their monthly painting comp, so 4 new minis done (theirs 2 quite nice ones), ill have pics of them some time next week. Iv also finally finished the wraithlords off! At the moment am working on entries for south chesire militaire, salute and gd paris, so busy busy busy!
Wraithlord Commission
My first garage kit
Evil Ryu
still lots of work to do on him, my compressor died half way through painting so i hand to finish him by hand since he was for a comp, that was 2 months ago, still waiting for the replacement.... supposed to have been posted on sat... i think gary the snail is gunna drop it off sometime 2morro....
and
the Ice Queen
Q. Does it look like ice??
only the base done so far, am hoping to put my base colours and highlights down with my airbrush, heres hoping...
am also working on a true scale marine for the little angels auction on wamp, not finished the whole sculpt yet but iv done molds for most of the parts so far, so hopefully ill get a true scale squad done for GDUK

their might also be a fex knocking about soon, iv got the hasslefree dio to finish (done for salute), squiggy races (GD Paris hopefully!), am getti parts for a grot tank and ill be working on a massive dio soon involving the large scale version of Rackhams the crow i got a while back
All the best
John